WO2022116155A1 - 情绪加工倾向的确定方法及相关产品 - Google Patents

情绪加工倾向的确定方法及相关产品 Download PDF

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WO2022116155A1
WO2022116155A1 PCT/CN2020/133917 CN2020133917W WO2022116155A1 WO 2022116155 A1 WO2022116155 A1 WO 2022116155A1 CN 2020133917 W CN2020133917 W CN 2020133917W WO 2022116155 A1 WO2022116155 A1 WO 2022116155A1
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emotional
graph
coordinate point
abscissa
voltage difference
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PCT/CN2020/133917
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English (en)
French (fr)
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胡立平
黄艳
唐红思
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中国科学院深圳先进技术研究院
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Priority to PCT/CN2020/133917 priority Critical patent/WO2022116155A1/zh
Publication of WO2022116155A1 publication Critical patent/WO2022116155A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/369—Electroencephalography [EEG]
    • A61B5/377—Electroencephalography [EEG] using evoked responses
    • A61B5/378—Visual stimuli
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis

Definitions

  • the present application relates to the field of brain science, in particular to a method for determining emotional processing tendency and related products.
  • stimuli in the environment of daily life There are many kinds of stimuli in the environment of daily life. Among them, stimuli that trigger emotions such as fear and anger are called negative emotional stimuli; stimuli that trigger emotions such as pleasure and comfort are called positive emotional stimuli; stimuli that do not cause emotional fluctuations are called neutral emotional stimuli. There are differences in the processing tendency of different individuals to different emotionally colored stimuli. For example, some individuals may be more sensitive (prior or more intensely or more frequently) to process negative emotional stimuli, while others may be more sensitive to positive emotional stimuli. Sexual emotional stimulation.
  • Oral report is one of the methods to know the individual's emotional processing tendency. It can learn the individual's emotional processing tendency by verbally asking which stimuli feel more obvious in different emotionally colored stimuli; however, the verbal report's The method is affected by the subjectivity of the individual, and the accuracy of the obtained results is not high.
  • Another detection method by contrastive presentation compares neutral emotional stimuli with positive emotional stimuli and negative emotional stimuli, and compares the difference in the individual's response to the two contrasting presentations, so as to obtain the individual's perception of neutral emotion.
  • the embodiments of the present application disclose a method and related products for determining the tendency of emotional processing.
  • the stimulation paradigm in which positive emotional stimulation and negative emotional stimulation are simultaneously presented with EEG technology, the emotional processing of an individual can be more accurately determined. tendency.
  • an embodiment of the present application provides a method for determining an emotional processing tendency, the method comprising: presenting a visual stimulus, where the visual stimulus is a stimulus including simultaneously presenting positive emotional stimuli and negative emotional stimuli; obtaining tests respectively The first voltage difference between the EEG generated by the left brain and the right brain to the above-mentioned positive emotional stimulation and the second voltage difference between the EEG generated by the above-mentioned negative emotional stimulation during the process of the target receiving the visual stimulation; Generating a first graph and a second graph, the first graph is a graph representing the change process of the first voltage difference after the test target receives the visual stimulus, and the second graph is a graph representing the second voltage The difference is a graph of the change process of the test target after receiving the visual stimulus; according to the difference in amplitude between the first graph and the second graph, the emotional processing tendency of the test target is determined.
  • the above-mentioned visual stimuli are images that contain both positive emotional stimuli and negative emotional stimuli.
  • the positive emotional stimuli can be a series of images that can arouse people's comfort, pleasure and other positive emotions, such as a person's smiling face or a warm and comfortable scene.
  • the negative emotional stimuli may be a series of images, such as a person's angry face or a bloody scene, which can induce people's negative emotions such as fear and sadness.
  • the above-mentioned visual stimuli also include neutral emotional stimuli, and the neutral emotional stimuli may be images that do not cause emotional fluctuations of people, such as faces without special expressions or ordinary scenes.
  • an electroencephalogram can be used to detect the voltage difference between the EEG generated by the left and right brains of the test target to the above-mentioned positive emotional stimulation and the brain voltage generated by the left and right brains of the test target to the above-mentioned negative emotional stimulation.
  • the voltage difference between the two voltage differences by comparing the characteristics of the two voltage differences, determines the clear processing tendency of the test object.
  • the test target is presented with a stimulation paradigm that includes both positive emotional stimulation and negative emotional stimulation, and combined with EEG technology to quantify its sensitivity to positive emotional stimulation and negative emotional stimulation with EEG indicators, It can more accurately determine the emotional processing tendency of an individual.
  • determining the emotional processing tendency of the test target according to the difference between the amplitudes in the first graph and the second graph includes: setting the absolute value of the ordinate in the first graph greater than Among the points of the first threshold, the coordinate point with the smallest abscissa is determined as the first coordinate point, and the coordinate point with the smallest abscissa in the points where the absolute value of the ordinate in the above-mentioned second graph is greater than the above-mentioned first threshold is determined as the second coordinate.
  • the absolute value of the difference between the abscissa of the first coordinate point and the abscissa of the second coordinate point is greater than the second threshold, and the abscissa of the first coordinate point is greater than the abscissa of the second coordinate point.
  • the emotional processing tendency of the above-mentioned test target is positive emotion
  • the absolute value of the difference between the abscissa of the above-mentioned first coordinate point and the abscissa of the above-mentioned second coordinate point is greater than the above-mentioned second threshold, and the above-mentioned first coordinate point.
  • the abscissa of the coordinate point is smaller than the abscissa of the second coordinate point, it is determined that the emotion processing tendency of the test target is negative emotion.
  • determining the emotional processing tendency of the test target according to the difference between the amplitudes in the first graph and the second graph includes: setting the absolute value of the ordinate in the first graph greater than Among the points of the first threshold, the coordinate point with the smallest abscissa is determined as the first coordinate point, and the coordinate point with the smallest abscissa in the points where the absolute value of the ordinate in the above-mentioned second graph is greater than the above-mentioned first threshold is determined as the second coordinate.
  • the absolute value of the difference between the abscissa of the above-mentioned first coordinate point and the abscissa of the above-mentioned second coordinate point is not greater than the second threshold, and the absolute value of the ordinate of the highest point in the above-mentioned first graph is greater than the above-mentioned first
  • the absolute value of the ordinate of the highest point in the two-curve graph it is determined that the emotional processing tendency of the test target is positive emotion; the difference between the abscissa of the first coordinate point and the abscissa of the second coordinate point is determined.
  • the emotional information processing tendency is negative emotion.
  • the latency period of the voltage difference between the left and right brains of the test target to generate the EEG to the positive emotional stimulus and the latency of the voltage difference to generate the EEG to the negative emotional stimulus reach a certain expected value. set threshold.
  • the magnitude of the absolute value of the ordinate corresponding to the highest point in the two graphs is further analyzed.
  • the magnitude of the absolute value can also quantify its sensitivity to positive emotional stimuli or negative emotional stimuli, and the larger the absolute value, the higher the sensitivity. Therefore, the emotional information processing tendency of the test target can be determined by comparing the magnitude between the two absolute values.
  • the second voltage difference between the EEGs generated by the stimulation includes: acquiring the third voltage difference between the EEGs generated by the left brain and the right hemisphere of the test target for the first emotional stimulation and the second emotional stimulation.
  • the fourth voltage difference between the EEGs, the first emotional stimulation is the positive emotional stimulation presented in the first area; the second emotional stimulation is the positive emotional stimulation presented in the second area; the above The first area and the second area are respectively the left half area and the right half area of the area where the above-mentioned visual stimulation is presented; the difference between the EEG generated by the above-mentioned left brain and the above-mentioned right brain of the above-mentioned test target to the third emotional stimulation is obtained.
  • the fifth voltage difference and the sixth voltage difference between the EEG generated by the fourth emotional stimulation, the third emotional stimulation is the negative emotional stimulation presented in the first area; the fourth emotional stimulation is presented in the The above-mentioned negative emotional stimulation in the above-mentioned second area; the above-mentioned third voltage difference and the above-mentioned fourth voltage difference are averaged to obtain the above-mentioned first voltage difference; The above-mentioned fifth voltage difference and the above-mentioned sixth voltage difference are averaged , the above-mentioned second voltage difference is obtained.
  • the above-mentioned positive emotional stimuli and the above-mentioned negative emotional stimuli included in all the above-mentioned visual stimuli are first classified.
  • the voltage difference between the EEG generated by the left and right hemispheres to the stimulation is due to the fact that the EEG response of the target whose stimulation appears in the contralateral visual field in the unilateral posterior brain area is higher than that caused by the target in the ipsilateral visual field. EEG responses were more negative. For example, if a certain stimulus is presented in the left direction of the visual field of the test target, the brain voltage generated by the right brain of the test target is more negative than the brain voltage generated by the left brain. The voltage difference between the left and right brain's EEG.
  • the positive emotional stimuli and negative emotional stimuli in the above-mentioned emotional stimuli according to their visual field positions of the above-mentioned test targets, and obtain the EEG voltages generated by the left and right brains of the above-mentioned test targets to different types of emotional stimuli.
  • the obtained voltage can be superimposed and averaged to obtain the overall average voltage difference between the test target and the above-mentioned positive emotional stimulation and the above-mentioned negative emotional stimulation.
  • the voltage difference can more accurately quantify the sensitivity of the test target to the positive emotional stimuli and the negative emotional stimuli.
  • an embodiment of the present application provides a device for determining an emotional processing tendency, the determining device comprising: a display unit for presenting visual stimuli, where the visual stimuli include a combination of positive emotional stimuli and negative emotional stimuli The stimuli presented at the same time; the acquiring unit is used to respectively acquire the first voltage difference between the EEG generated by the left brain and the right brain of the test target to the positive emotional stimulus during the process of receiving the visual stimulus and the the second voltage difference between the electroencephalograms generated by negative emotional stimulation; the processing unit is configured to generate a first graph and a second graph, wherein the first graph is for characterizing the first voltage difference in the test a graph of the change process after the target receives the visual stimulus, and the second graph is a graph representing the change process of the second voltage difference after the test target receives the visual stimulus; the determining unit, using The emotion processing tendency of the test target is determined according to the difference between the amplitudes in the first graph and the second graph.
  • the determining unit is specifically configured to determine the coordinate point with the smallest abscissa among the points where the absolute value of the ordinate in the first graph is greater than the first threshold, as the first coordinate point, Determine the coordinate point with the smallest abscissa among the points where the absolute value of the ordinate in the second graph is greater than the first threshold value as the second coordinate point; between the abscissa of the first coordinate point and the second coordinate point When the absolute value of the difference between the abscissas of the coordinate points is greater than the second threshold, and the abscissa of the first coordinate point is greater than the abscissa of the second coordinate point, it is determined that the emotional processing tendency of the test target is Positive emotion; the absolute value of the difference between the abscissa of the first coordinate point and the abscissa of the second coordinate point is greater than the second threshold, and the abscissa of the first coordinate point is smaller than the In the case of the abscissa
  • the determining unit is specifically configured to determine the coordinate point with the smallest abscissa among the points where the absolute value of the ordinate in the first graph is greater than the first threshold, as the first coordinate point, Determine the coordinate point with the smallest abscissa among the points where the absolute value of the ordinate in the second graph is greater than the first threshold value as the second coordinate point; between the abscissa of the first coordinate point and the second coordinate point The absolute value of the difference between the abscissas of the coordinate points is not greater than the second threshold, and the absolute value of the ordinate of the highest point in the first graph is greater than the absolute value of the ordinate of the highest point in the second graph.
  • the emotional processing tendency of the test target is positive emotion; the absolute value of the difference between the abscissa of the first coordinate point and the abscissa of the second coordinate point is not greater than the second threshold , and when the absolute value of the ordinate of the highest point in the first graph is not greater than the absolute value of the ordinate of the highest point in the second graph, it is determined that the emotional processing tendency of the test target is negative mood.
  • the acquiring unit is specifically configured to acquire the third voltage difference between the EEG generated by the left brain and the right brain of the test target to the first emotional stimulation, and the corresponding voltage difference.
  • the fourth voltage difference between the EEGs generated by the second emotional stimulation, the first emotional stimulation is the positive emotional stimulation presented in the first area; the second emotional stimulation is presented in the second area the positive emotional stimulus; the first area and the second area are the left half area and the right half area of the area where the visual stimulus is presented; the left brain and the
  • an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer storage medium, the computer program includes program instructions, and when executed by a processor, the program instructions cause the processor to execute the above-mentioned The method of the first aspect and any optional implementation manner.
  • an embodiment of the present application provides an electronic device, the electronic device includes: a memory for storing a program; a processor for executing the program stored in the memory, when the program is executed, The processor is configured to execute the method of the first aspect and any of the optional implementation manners.
  • FIG. 1 is a schematic diagram of a system for determining an emotion processing tendency according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of an emotional stimulation paradigm provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of another emotional stimulation paradigm provided by an embodiment of the present application.
  • FIG. 4 is a flowchart of a method for determining an emotion processing tendency provided by an embodiment of the present application
  • FIG. 5 is a schematic diagram of another emotional stimulation paradigm provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a N2pc composition curve provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a device for determining an emotion processing tendency according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • At least one (item) means one or more
  • plural means two or more
  • at least two (item) means two or three and three
  • “and/or” is used to describe the relationship of related objects, indicating that there can be three kinds of relationships, for example, "A and/or B” can mean: only A exists, only B exists, and both A and B exist three A case where A and B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an “or” relationship.
  • At least one of the following” or similar expressions refers to any combination of these items. For example, at least one (a) of a, b or c, can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ".
  • Embodiments of the present invention provide a method for determining emotion processing tendency.
  • the following first introduces some knowledge involved in the method for determining the emotion processing tendency provided by the embodiments of the present application.
  • EEG Electroencephalogram
  • EEG refers to a special instrument for recording spontaneous EEG. It mainly includes magnification, recording, display and flash, and consumables such as electrodes or electrode caps, conductive pastes, and cleaning agents. Some have EEG analysis capabilities. Generally, it can receive 8 to 128 EEG signals at the same time. In addition to the function of releasing brain electrical signals, the amplifying part also has the function of filtering, and the time constant and sensitivity can be adjusted.
  • N2pc is a brain evoked potential component closely related to spatially selective attention, reflecting spatially selective processing of current task-related stimuli.
  • N stands for negative wave (negative)
  • 2 means that the component appears approximately between 200ms and 300ms after stimulus presentation
  • pc means that its scalp distribution position is behind the contralateral brain of the target stimulus
  • N2pc is a large unilateral posterior negative wave whose amplitude is often used as an indicator of the amount of attention allocated to target stimuli, while its latency reflects the time point of attention allocation to target stimuli.
  • Emotional information processing tendency There are differences in the processing tendency of different individuals to stimuli of different emotional colors. For example, some individuals may be more sensitive (prior or more intensely or frequently) to process negative emotional stimuli (causing anger, sadness) Emotional stimuli), while other individuals may be more sensitive to positive emotional stimuli (stimuli that elicit comfortable, pleasurable emotions). Emotional information processing tendency can reflect whether individuals are more sensitive to negative emotional stimuli or positive emotional stimuli.
  • FIG. 1 a schematic diagram of a system for determining an emotion processing tendency provided by an embodiment of the present application will be introduced first. Please refer to FIG. 1 .
  • the emotional processing tendency determination system is composed of a terminal device 101 and an EEG device 103 .
  • the terminal device 101 may be a computer, a mobile phone, a tablet, or other devices with a visualization function.
  • the EEG device may be an EEG signal collector, an EEG instrument and other EEG devices.
  • the terminal 101 is responsible for presenting visual stimulation.
  • the EEG device 103 acquires the test target 102 through its electrodes attached to the cerebral cortex of the test target 102 .
  • the related data of EEG generated by the brain is transmitted to the terminal device 101 for storage.
  • the terminal device 101 can analyze and process the above related data to obtain the emotional processing tendency of the test target 102 . It should be understood that since the posterior brain region of the human brain is in charge of visual processing, the EEG difference generated by the stimulation located in the unilateral visual field is also generated by the posterior brain. When using it, it needs to cover the back area of the human brain.
  • the above-mentioned system may include a plurality of devices similar to the terminal device 101 .
  • a single terminal device may only be responsible for presenting visual stimuli, and the subsequent data analysis of the EEG can be completed by another terminal device.
  • the EEG device 103 may have a certain ability to analyze and process EEG data, and after it acquires the EEG related data generated by the brain of the test target 102, the EEG The device may perform preprocessing operations such as amplification and filtering on the relevant data, and transmit the EEG data obtained after the preprocessing to the above-mentioned terminal device 101 .
  • FIG. 1 a schematic diagram of an emotional stimulation paradigm provided by an embodiment of the present application is introduced.
  • the emotional stimulation paradigm can be combined with the terminal device 101 as shown in FIG. 1 to determine the emotional processing tendency of the above test target. See Figure 2.
  • FIG. 2 is a schematic diagram of an emotional stimulation paradigm provided by an embodiment of the present application.
  • the trials 20 and 21 in FIG. 2 are stimuli including multiple face images, wherein the human face 201 is an angry human face, the human face 211 is a happy human face, and the human face 202 And the human face 212 is a human face with no obvious expression, and "+" is the central gaze point.
  • the emotional stimuli shown by the human face 201 are called negative emotional stimuli
  • the emotional stimuli shown by the human face 211 are called positive emotional stimuli
  • the emotional stimuli shown by the human face 202 or 212 are called positive emotional stimuli.
  • Trial 20 contains only one face with negative emotional stimuli, and the rest are neutral emotional stimuli like 202, which we call negative stimuli; similarly, Trial 21 only contains One face with positive emotional stimuli, and the rest are neutral emotional stimuli faces like 212, which we call positive stimuli.
  • the target is tested using the above emotional stimulation paradigm, and combined with a terminal device with a visualization function (refer to the terminal device 101 in FIG. 1 ), the target's emotional information processing tendency can be roughly obtained.
  • the specific implementation process is as follows:
  • test target Before the test, set a test task for the test target, asking the test target to find out the happy faces (please refer to 211) among the faces contained in positive stimuli (please refer to trial 21), or to find the negative sexual stimuli (see trial 20) contained angry faces (see 201).
  • the above-mentioned terminal equipment randomly presents a certain number of trials of negative stimulation (please refer to trial 20) and trials of positive stimulation (please refer to trial 21) to the target, each time only one trial is presented. and the time for presenting the trials is limited, the above test target needs to find out the faces of positive emotional stimuli or the faces of negative emotional stimuli in the trial within the limited time.
  • the above-mentioned terminal equipment records the duration and completion of the task for the test target.
  • the terminal device After the test target completes the answer to all trials, the terminal device will count the test target to find the positive stimulus.
  • the average duration and correct rate of the faces of sexual emotional stimuli, and the average duration and correct rate of the test target to find the faces of negative emotional stimuli in negative stimuli, and the test target is determined according to the size of the two durations and the correct rate.
  • Emotional information processing tendency is positive emotion or negative emotion. For example, if the test target completes the search task for 100 trials (50 trials are positive stimuli, and the other 50 trials are negative stimuli), the above-mentioned terminal device records the search for each trial.
  • the average time for the test target to find faces with positive emotional stimuli in positive stimuli is 2.5 seconds, and the correct rate of finding faces with positive emotional stimuli in positive stimuli is 2.5 seconds. 99%; but its average time to find faces with negative emotional stimuli in negative stimuli is 2.65 seconds, and its correct rate of finding faces with positive emotional stimuli in positive stimuli is 96%, so to some extent It is considered that the emotional information processing tendency of the test target is positive emotion.
  • trial 20 and trial 21 in FIG. 2 are only one of the manifestations of positive stimulus or negative stimulus, and there may also be other manifestations.
  • the human face in the figure can be replaced with other images, as long as the emotion evoked by the image can be clearly distinguished as positive, negative and neutral; in addition, the arrangement of each image in the trial can be different , as long as all images in the trial are evenly distributed in the area presenting the above stimuli.
  • positive and negative stimuli they should be unique in the same test. That is to say, in the 100 trials presented to the above-mentioned test target, the images contained in any trial can only be human faces, and the images in one trial are arranged in a circle.
  • the stimulation paradigm only includes the simultaneous presentation of neutral emotional stimuli and positive emotional stimuli. Stimuli and stimuli that present both neutral emotional stimuli and negative emotional stimuli do not include stimuli that present both negative emotional stimuli and positive emotional stimuli.
  • the inference obtained by using the average time and accuracy of the test target to find faces with positive emotions in positive stimuli and the average time and accuracy of the test target to find faces with negative emotions in negative stimuli as indicators is to a certain extent. Still lacks objectivity. Therefore, more accurate and objective methods for determining emotional processing tendencies need to be studied.
  • the embodiment of the present application adopts an innovative stimulation paradigm, innovates the test task (no longer is to find positive emotional stimuli or negative emotional stimuli from multiple neutral emotional stimuli), and combines the brain
  • the electrical index is used to quantify the processing bias of individuals to different emotional stimuli, by observing the individual's response to positive emotional stimuli and negative emotional stimuli when receiving competitive stimuli (ie, stimuli presented at the same time by negative emotional faces and positive emotional faces).
  • EEG response the main EEG index observed is the N2pc component (that is, the voltage difference between the left and right brains).
  • FIG. 3 is a schematic diagram of another emotional stimulation paradigm provided by an embodiment of the present application.
  • the emotional stimulus paradigm can be used as the visual stimulus in the above description of FIG. 1 , and combined with the system shown in FIG. 1 to more accurately learn the emotional processing tendency of the test target.
  • the stimulus paradigm selects the human face as the carrier of emotional stimuli, and each competitive stimulus contains a positive emotional stimulus (happy face, such as face 3011) and a negative emotional stimulus (anger face, such as face 3012) and a plurality of neutral emotional stimuli (faces without special expressions, such as faces selected with a circle dotted line in 301).
  • “+” in the figure is the central fixation point of the target when the stimulus is presented to the test target.
  • the vertical dotted line in Figure 3 divides the presentation area of the competitive stimulus into the left half area and the The right half area; it should be understood that the dotted line is only for the convenience of the reader's understanding, and in an actual application scenario, the dotted line does not exist.
  • Both positive emotional stimuli and negative emotional stimuli are located in the competitive stimuli in the left half of the above-mentioned presentation area; for example, in the stimulus 301 in Figure 3, the happy face 3011 and the angry face 3012 are located on the left side of the dotted line;
  • Both positive emotional stimuli and negative emotional stimuli are located in the competitive stimuli in the right half of the above-mentioned presentation area; for example, in the stimulus 302 in Figure 3, the happy face 3021 and the angry face 3022 are located on the right side of the dotted line;
  • Positive emotional stimuli are located in the middle of the above-mentioned presentation area, and negative stimuli are located in the competitive stimuli on the right side of the above-mentioned presentation area; for example, in the stimulus 303 in Figure 3, the happy face 3031 is located on the dotted line, and the angry face 3032 is located on the dashed line. the right side of the dotted line;
  • Positive emotional stimuli are located in the middle of the above-mentioned presentation area, and negative stimuli are located in the competitive stimuli on the left side of the above-mentioned presentation area; for example, in the stimulus 304 in Figure 3, the happy face 3041 is located on the dotted line, and the angry face 3042 is located on the dashed line. the left side of the dotted line;
  • Negative emotional stimuli are located in the middle of the above-mentioned presentation area, and positive stimuli are located in the competitive stimuli on the left side of the above-mentioned presentation area; for example, in the stimulus 305 in Figure 3, the angry face 3052 is located on the dotted line, and the happy face 3051 is located on the dashed line. the left side of the dotted line;
  • Negative emotional stimuli are located in the middle of the above-mentioned presentation area, and positive stimuli are located in the competitive stimuli on the right side of the above-mentioned presentation area; for example, stimulation 306 in Figure 3, its angry face 3062 is located on the dotted line, and happy face 3061 is located the right side of the dotted line;
  • 301 to 306 in FIG. 3 are only specific forms of the above-mentioned six competitive stimulus categories.
  • the test target will receive hundreds or even more stimulus categories similar to those shown in 301 to 306.
  • stimuli and can be classified into one of the above-mentioned 6 types of competitive stimuli according to the presentation position of the positive emotional stimuli (ie, happy faces) and negative emotional stimuli (ie, angry faces) they contain.
  • the electrodes of the EEG as shown in Figure 1 were placed over the posterior brain area of the test target, and then the test target would be informed of the test tasks to be completed when receiving the stimulation in Figure 3, That is, find out the faces whose gender or age is different from the other faces in the faces presented by the stimulus in Fig. 2; take the stimulus 301 in Fig. 3 as an example to illustrate, when the stimulus 301 is presented to the test target, the test target needs to be in the specified Observing the faces in the stimulus 301 for a period of time, and finding out six of the faces whose gender or age is different from the other five, when the test target observes the faces in the stimulus 301, use the EEG to obtain the EEG information of the test target.
  • the face selected by the circular dotted frame in the stimulus 301 is the target face, and its gender or age is different from the other five faces. It should be understood that the dotted circles in the stimuli 301 to 306 in FIG. 3 are only for the convenience of the reader's understanding, and do not exist in actual application scenarios.
  • the combination of stimulus paradigms shown in Figure 3 may also include competing stimuli that do not include the target face. That is to say, in this embodiment, the competitive stimuli can also be classified into the above-mentioned 6 categories, each of which can also include stimuli with target faces (that is, faces with gender or age different from other faces) and stimuli that do not exist. For stimuli that contain target faces, the test task can also be set to determine whether the target faces are present in the stimuli.
  • the following introduces a flowchart of a method for determining an emotion processing tendency provided by an embodiment of the present application.
  • the method may use the combination of stimulus paradigms shown in FIG. 3 and combine with the system shown in FIG. 1 to obtain a more accurate knowledge test.
  • the target's emotional processing tendency, the results obtained are objective and reliable.
  • FIG. 4 is a flowchart of a method for determining an emotion processing tendency provided by an embodiment of the present application.
  • the method may include:
  • the tendency determination device presents visual stimuli, where the visual stimuli are stimuli including positive emotional stimuli and negative emotional stimuli.
  • the above-mentioned tendency determination device may be a terminal device with a visualization function and a data processing and analysis function, such as a computer, a mobile phone, a tablet, etc. (refer to the terminal device 101 in FIG. 1 ).
  • the above-mentioned visual stimulation is an image including both positive emotional stimulation and negative emotional stimulation, and the visual stimulation can be presented on the display screen of the above-mentioned tendency determination device.
  • the image used for the visual stimulus may be preprocessed so that it is presented as a clear and black-and-white image. .
  • the visual stimuli can be classified into 6 types according to the presentation positions of positive emotional stimuli and negative emotional stimuli (for details, please refer to the classification in the description of FIG. 3 ).
  • the above-mentioned tendency determination device acquires the first voltage difference between the EEGs generated by the left brain and the right hemisphere to the above-mentioned positive emotional stimulation and the difference between the EEGs generated by the above-mentioned negative emotional stimulation during the process of receiving the visual stimulation of the test target. the second voltage difference between.
  • N2pc is a difference wave obtained by subtracting the ipsilateral waveform from the contralateral EEG waveform of the human brain.
  • the EEG responses evoked by the target were more negative.
  • the target in the left visual field is the ipsilateral target
  • the target in the right visual field is the contralateral target
  • the target in the right visual field is the opposite.
  • the target is the ipsilateral target
  • the target in the left field of view is the contralateral target.
  • N2pc was the right brain EEG minus the left brain EEG; the same The reason is that when the stimulus appears in the right visual field of the test target, the EEG response of the left brain is more negative than that of the right brain. At this time, N2pc is the left brain EEG minus the right brain EEG.
  • the above acquisition of the voltage difference of the EEG can be accomplished by an EEG device (refer to the EEG device 101 in FIG. 1 ).
  • EEG device 101 in FIG. 1 Take the stimulation paradigm in Figure 3 as an example to illustrate. It should be understood that when positive emotional stimuli or negative emotional stimuli appear in the center of the test target visual field, such as the dotted line of the stimulus shown in Figure 3, the brain will not produce N2pc components or the N2pc components generated can be ignored. Excluding.
  • the above-mentioned acquisition of the first voltage difference between the EEG generated by the left hemisphere and the right hemisphere in response to the above-mentioned positive emotional stimuli during the process of receiving the visual stimulation of the test target actually only obtains the positive emotional stimulation of the above-mentioned test target and is not at the position of the dotted line EEG generated by stimulation on. Specifically, it is to obtain the EEG generated by the test target to the competitive stimuli of the categories described in the stimulation 301, stimulation 302, stimulation 305 and stimulation 306 in FIG.
  • the tendency determining device first obtains the left-brain and right-brain pairs of the stimulus 301 and the stimulus 305 of the test target extracted by the EEG device.
  • the EEG data generated by the above-mentioned positive emotional stimulation and then subtract the EEG of the left brain from the EEG of the right brain to obtain a voltage difference, and then obtain the left brain and right brain of the test target to the category of the stimulation 302 and the stimulation 306.
  • the EEG data generated by the above positive emotional stimulation in the stimulation of that is, the N2pc component of the brain's overall response to positive emotional stimuli.
  • the above-mentioned tendency determination device will first extract the left side of the above-mentioned test target.
  • the brain and the right brain generate the EEG generated by the above-mentioned negative emotional stimuli in the stimuli that belong to the stimulus 301 and the stimulus 304, and then subtract the EEG of the left brain from the EEG of the right brain to obtain a voltage difference, and then extract the above test target
  • the left brain and right brain generate the EEG generated by the above negative emotional stimuli in the stimuli 302 and 303 belong to the category, and then subtract the EEG of the right brain from the EEG of the left brain to obtain another voltage difference.
  • the two voltage differences are superimposed and averaged to obtain the above-mentioned second voltage difference, that is, the N2pc component of the whole brain to negative emotional stimulation.
  • the above-mentioned tendency determination device generates a first graph and a second graph; the first graph is a graph representing the change process of the first voltage difference, and the second graph is a graph representing the change of the second voltage difference a graph of the process;
  • the first voltage difference and the second voltage difference obtained in step 402 can be understood as the voltage difference between the left and right brains at a certain time.
  • an algorithm can be used to generate graphs of the change process of the N2pc component generated by the two voltage differences since the test target receives stimulation, that is, the above-mentioned first graph and second graph.
  • the tendency determination device may first generate the N2pc of the test target's left brain and right brain to the positive emotional stimuli of the categories of stimuli 301 and 305 to which the stimuli belong over time. and the second positive curve of the N2pc of the EEG generated by the above-mentioned positive emotional stimuli in the stimuli of the categories to which the stimuli 302 and 306 belong; similarly, the above-mentioned tendency determination device It is possible to first generate a first negative curve graph of the change of N2pc over time generated by the left brain and right brain of the above-mentioned test target to the above-mentioned negative emotional stimuli in the stimuli of the categories to which the stimuli 301 and 304 belong, and to the stimuli 302 and stimuli 304.
  • 303 is a second negative curve diagram of the EEG N2pc of the EEG generated by the positive emotional stimulus in the category of stimuli over time; in step 403, only the above-mentioned first positive curve diagram and the second positive curve
  • the above-mentioned first graph can be obtained by superimposing and averaging the graphs; similarly, the above-mentioned second graph can be obtained by superimposing and averaging the above-mentioned first negative graph and the second negative graph.
  • the above-mentioned tendency determining device determines the emotion processing tendency of the above-mentioned test target according to the difference between the amplitudes in the above-mentioned first graph and the above-mentioned second graph.
  • the tendency determination device After obtaining the first graph and the second graph, the tendency determination device will analyze the point where the absolute value of the first ordinate in the two graphs is greater than or equal to a certain threshold. It should be understood that within 0-150ms of the above-mentioned test target receiving stimulation, the value of N2pc is relatively small, and it can be considered that N2pc is in the latency period at this time. Generally, within 150s-300ms after receiving stimulation, the value of N2pc will rise sharply and steadily, reach the peak value and then decrease.
  • the resulting value is the absolute value of Greater than 10, such as -11, that is, the time of the N2pc of the above-mentioned test target to positive emotional stimuli is 11ms earlier than the time of N2pc to the above-mentioned negative emotional stimuli, it can be considered that it is more sensitive to positive emotions, then determine Its emotional processing tendency is positive emotion; for the same reason, if the difference is 11, that is, the time of N2pc of the above-mentioned test target to negative emotional stimuli is 11ms earlier than the time of N2pc of the above-mentioned positive emotional stimuli, it can be considered that It is more sensitive to negative emotions, and its emotional processing tendency is determined
  • the processing bias of the emotional information will be obtained by comparing the magnitudes of the absolute values of the peaks in the two curves, if the absolute value of the peak of the first curve is greater than the absolute value of the peak of the second curve value, the emotion processing tendency is determined to be positive emotion; otherwise, the emotion processing tendency is determined to be negative emotion.
  • the stimulation paradigm of the competitive stimulus described above can be combined with the stimulation paradigm of the positive stimulus and the negative stimulus in Figure 2 to form a new stimulus paradigm (see Figure 5), and the The method shown in Figure 4 tests the stimulation effects of the two new stimulation paradigms above on the test target respectively, to compare the superiority between the two paradigms.
  • FIG. 5 introduces a schematic diagram of another emotional stimulation paradigm provided by the embodiment of the present application, please refer to FIG. 5 .
  • the stimuli 501 and 504 can be compared to the competitive stimuli shown in FIG. 3
  • the stimuli 502 and 505 can be compared to the negative stimuli shown in FIG. 2
  • the stimuli 503 and 506 can be compared to the positive stimuli shown in FIG. 2 .
  • sexual stimulation Among them, the rectangular dashed box selects positive emotional stimuli (happy faces) or negative emotional stimuli (angry faces), and the oval dashed box selects the target face of the test task (the faces of different genders in the stimulus). ), "+" is the center fixation point of the test target. It should be understood that the above-mentioned rectangular dashed-line frame and ellipse-shaped dashed-line frame are for the convenience of readers' understanding, and do not exist in actual application scenarios.
  • FIG. 6 is a schematic diagram of an N2pc composition curve provided by an embodiment of the present application.
  • the solid curve 601 is the N2pc component curve generated by the test target to the positive emotional stimulus in the competitive stimulus in FIG. 5 ;
  • the solid curve 602 is the generation of the negative emotional stimulus in the competitive stimulus in FIG. 5 by the test target.
  • the dashed curve 603 is the N2pc component graph generated by the above-mentioned test target to the negative emotional stimulus in the negative stimulus in FIG. 5;
  • the dashed curve 604 is the above-mentioned test target to the positive emotional stimulus in the positive stimulus in FIG. 5.
  • the N2pc component curve diagram of ; the curve segment selected by the rectangular dotted box is the period when the N2pc component is most obvious.
  • FIG. 7 The following describes a schematic structural diagram of a device for determining an emotion processing tendency provided by an embodiment of the present application, please refer to FIG. 7 .
  • FIG. 7 is a schematic structural diagram of a device for determining an emotion processing tendency according to an embodiment of the present application. As shown in Figure 7, the device includes:
  • a display unit for presenting visual stimuli, the visual stimuli being stimuli including positive emotional stimuli and negative emotional stimuli;
  • the acquiring unit is used to respectively acquire the first voltage difference between the EEG generated by the positive emotional stimulus and the EEG generated by the negative emotional stimulus from the left brain and the right brain during the process of receiving the visual stimulus. the second voltage difference between;
  • a processing unit for generating a first graph and a second graph where the first graph is a graph representing the change process of the first voltage difference after the test target receives the visual stimulus, and the second graph is A graph representing the change process of the second voltage difference after the test target receives the visual stimulus;
  • a determining unit configured to determine the emotion processing tendency of the test target according to the difference between the amplitudes in the first graph and the second graph.
  • the determining unit is specifically configured to determine the coordinate point with the smallest abscissa among the points where the absolute value of the ordinate in the first graph is greater than the first threshold as the first coordinate point, and the Among the points where the absolute value of the ordinate in the second graph is greater than the first threshold, the coordinate point with the smallest abscissa is determined as the second coordinate point; in the difference between the abscissa of the first coordinate point and the abscissa of the second coordinate point When the absolute value of the difference is greater than the second threshold, and the abscissa of the first coordinate point is greater than the abscissa of the second coordinate point, it is determined that the emotional processing tendency of the test target is positive emotion; When the absolute value of the difference between the abscissa of the point and the abscissa of the second coordinate point is greater than the second threshold, and the abscissa of the first coordinate point is smaller than the abscissa of the second coordinate point
  • the determining unit is specifically configured to determine the coordinate point with the smallest abscissa among the points where the absolute value of the ordinate in the first graph is greater than the first threshold as the first coordinate point, and the Among the points where the absolute value of the ordinate in the second graph is greater than the first threshold, the coordinate point with the smallest abscissa is determined as the second coordinate point; in the difference between the abscissa of the first coordinate point and the abscissa of the second coordinate point When the absolute value of the difference is not greater than the second threshold, and the absolute value of the ordinate of the highest point in the first graph is greater than the absolute value of the ordinate of the highest point in the second graph, determine the test target
  • the emotional processing tendency of is positive emotion; the absolute value of the difference between the abscissa of the first coordinate point and the abscissa of the second coordinate point is not greater than the second threshold, and the highest point in the first graph When the absolute value of the ordinate is not greater than the absolute
  • the acquiring unit is specifically configured to acquire the third voltage difference between the EEG generated by the left brain and the right brain of the test target to the first emotional stimulus and the voltage difference generated by the second emotional stimulus.
  • the fourth voltage difference between the EEGs, the first emotional stimulus is the positive emotional stimulus presented in the first region; the second emotional stimulus is the positive emotional stimulus presented in the second region; the first emotional stimulus is the positive emotional stimulus presented in the second region
  • the first area and the second area are the left half area and the right half area of the area presenting the visual stimulus respectively; obtain the fifth voltage difference between the EEG generated by the left brain and the right brain of the test target to the third emotional stimulus and the sixth voltage difference between the EEGs generated by the fourth emotional stimulation, the third emotional stimulation is the negative emotional stimulation presented in the first area; the fourth emotional stimulation is presented in the second area The negative emotional stimulation in Two voltage difference.
  • FIG. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
  • the electronic device 80 includes a processor 801 , a memory 802 , a display 803 and a communication interface 804 ;
  • the electronic device in FIG. 8 may be the tendency determination apparatus in the foregoing embodiment.
  • the memory 802 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read only memory (EPROM), or portable Read-only memory (compact disc read-only memory, CDROM), the memory 802 is used for related instructions and data.
  • Communication interface 804 is used to receive and transmit data.
  • the processor 801 may be one or more central processing units (central processing units, CPUs). In the case where the processor 801 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.
  • the display 803 may be a display of a computer or a display of a mobile phone or tablet. The steps performed by the tendency determination apparatus in the above embodiment may be based on the structure of the electronic device shown in FIG. 8 . Specifically, the processor 801 can implement the functions of each unit in FIG. 7 .
  • Another computer-readable storage medium is provided in the embodiments of the present application, where the computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, realizes: presenting a visual stimulus, where the visual stimulus includes a positive The stimulus presented at the same time as emotional stimulus and negative emotional stimulus; respectively obtain the first voltage difference between the EEG generated by the left brain and the right brain of the test target in the process of receiving the visual stimulus to the positive emotional stimulus and the negative The second voltage difference between the EEGs generated by sexual emotional stimulation; generating a first graph and a second graph, the first graph representing the change process of the first voltage difference after the test target receives the visual stimulus , the second graph is a graph representing the change process of the above-mentioned second voltage difference after the above-mentioned test target accepts the above-mentioned visual stimulation; Emotional processing tendencies of the above test targets.
  • the embodiments of the present application provide a computer program product containing instructions, which, when run on a computer, cause the computer to execute the method for determining an emotion processing tendency provided by the foregoing embodiments.

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Abstract

一种情绪加工倾向的确定方法和相关产品，情绪加工倾向的确定方法包括：呈现包括正性情绪刺激与负性情绪刺激的刺激；分别获取测试目标(102)在接受刺激的过程中左脑与右脑对正性情绪刺激产生的脑电之间的第一电压差以及对负性情绪刺激产生的脑电之间的第二电压差；生成表征第一电压差的变化过程的第一曲线图和表征第二电压差的变化过程的第二曲线图；根据第一曲线图与第二曲线图中波幅的差异，确定测试目标(102)的情绪加工倾向；通过特定的刺激范式与脑电技术相结合，能较为准确的确定个体的情绪加工倾向。

Description

情绪加工倾向的确定方法及相关产品 技术领域
本申请涉及脑科学领域，尤其涉及一种情绪加工倾向的确定方法及相关产品。
背景技术
日常生活的环境中存在多种多样刺激。其中，引发恐惧、愤怒等情绪的刺激称为负性情绪刺激；引发愉悦、舒适等情绪的刺激称为正性情绪刺激；未对个体造成情绪波动的刺激称为中性情绪刺激。不同个体对不同情绪色彩的刺激的加工倾向性存在差异，例如，有的个体可能更敏感于(优先或更强烈地或更频繁地)加工负性情绪刺激，而另一些个体可能更敏感于正性情绪刺激。
口头报告是获知个体情绪加工倾向性的方法之一，其通过口头询问个体在不同情绪色彩的刺激中对哪种刺激的感觉更为明显，来获知个体的情绪加工倾向性；然而，口头报告的方法受个体的主观性影响，所得结果的准确度不高。另一种通过对比呈现的检测方法通过将中性情绪刺激分别与正性情绪刺激和负性情绪刺激对比呈现，比较个体对两种对比呈现的反应时的差异，以此得出个体对中性情绪刺激同正性情绪刺激以及中性情绪刺激同负性情绪刺激之间反应时的差异，从而获知个体的情绪加工偏向；但通过对比呈现的检测方法在每次试验中所得到的结论并不一致，不具有稳定性和准确性。因此，需要研究更为客观、更为准确的检测方法。
发明内容
本申请实施例公开了一种情绪加工倾向的确定方法和相关产品，通过将正性情绪刺激和负性情绪刺激同时呈现的刺激范式与脑电技术相结合，能较为准确的确定个体的情绪加工倾向。
第一方面，本申请实施例提供了一种情绪加工倾向的确定方法，该方法包括：呈现视觉刺激，该视觉刺激为包括将正性情绪刺激与负性情绪刺激同时呈现的刺激；分别获取测试目标在接受该视觉刺激的过程中左脑与右脑对上述正性情绪刺激产生的脑电之间的第一电压差以及对上述负性情绪刺激产生的脑电之间的第二电压差；生成第一曲线图与第二曲线图，该第一曲线图为表征上述第一电压差在上述测试目标接受上述视觉刺激后的变化过程的曲线图，该第二曲线图为表征上述第二电压差在上述测试目标接受上述视觉刺激后的变化过程的曲线图；根据该第一曲线图与该第二曲线图中波幅的差异，确定上述测试目标的情绪加工倾向。
上述视觉刺激为同时包含正性情绪刺激和负性情绪刺激的图像，该正性情绪刺激可以是人的笑脸或温暖舒适的场景等一系列能够引发人舒适、愉悦等正性情绪的图像，而该负性情绪刺激可以是人生气的脸或流血的场景等一系列能够引发人恐惧、难过等负性情绪的图像。此外，上述视觉刺激还包括中性情绪刺激，该中性情绪刺激可以是无特别表情的人脸或者普通的场景等不会造成人的情绪波动的图像。应理解，虽然视觉刺激所包含的情绪刺激的表现形式可以是多样的，但在同一测试中，其整体的表现形式应为同样的。也就是 说，当上述视觉刺激中的图像中有一张图像中的情绪刺激为人脸图像，则在该测试中所有的视觉刺激都应采用人脸图像作为情绪刺激。此外，对同一视觉刺激而言，其包含的多个不同情绪色彩(正性、负性和中性)的情绪刺激需能被较为明显的分辨为属于三种情绪色彩(正性、负性和中性)中的哪一种情绪色彩。在上述测试目标接受上述视觉刺激的过程中，可利用脑电仪探测该测试目标左右脑对上述正性情绪刺激产生的脑电之间的电压差以及左右脑对上述负性情绪刺激产生的脑电之间的电压差，通过比较两个电压差的特征，来确定该测试目标的清楚加工倾向。
本申请实施例通过给测试目标呈现同时包含正性情绪刺激和负性情绪刺激的刺激范式，并结合脑电技术，以脑电指标量化其对正性情绪刺激和负性情绪刺激的敏感程度，能较为准确的确定个体的情绪加工倾向。
在一个可选的实现方式中，上述根据上述第一曲线图与上述第二曲线图中波幅的差异，确定上述测试目标的情绪加工倾向包括：将上述第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将上述第二曲线图中纵坐标的绝对值大于上述第一阈值的点中横坐标最小的坐标点确定为第二坐标点；在上述第一坐标点的横坐标与上述第二坐标点的横坐标的差值的绝对值大于第二阈值，且上述第一坐标点的横坐标大于上述第二坐标点的横坐标的情况下，确定上述测试目标的情绪加工倾向为正性情绪；在上述第一坐标点的横坐标与上述第二坐标点的横坐标的差值的绝对值大于上述第二阈值，且上述第一坐标点的横坐标小于上述第二坐标点的横坐标的情况下，确定上述测试目标的情绪加工倾向为负性情绪。
在该实现方式中，通过观测上述测试目标的左右脑对上述正性情绪刺激产生脑电的电压差的潜伏期长短以及对上述负性情绪刺激产生脑电的电压差的潜伏期长短来量化其对正性情绪刺激和负性情绪刺激的敏感程度，在两个潜伏期的时间差达到某个预设的阈值时，则表示该测试目标对上述正性情绪刺激和上述负性情绪刺激的敏感程度是存在明显区别的，由此可确定该测试目标对情绪信息的加工倾向为潜伏期短的曲线图所对应的情绪。
在一个可选的实现方式中，上述根据上述第一曲线图与上述第二曲线图中波幅的差异，确定上述测试目标的情绪加工倾向包括：将上述第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将上述第二曲线图中纵坐标的绝对值大于上述第一阈值的点中横坐标最小的坐标点确定为第二坐标点；在上述第一坐标点的横坐标与上述第二坐标点的横坐标的差值的绝对值不大于第二阈值，且上述第一曲线图中最高点的纵坐标的绝对值大于上述第二曲线图中最高点的纵坐标的绝对值的情况下，确定上述测试目标的情绪加工倾向为正性情绪；在上述第一坐标点的横坐标与上述第二坐标点的横坐标的差值的绝对值不大于上述第二阈值，且上述第一曲线图中最高点的纵坐标的绝对值不大于上述第二曲线图中最高点的纵坐标的绝对值的情况下，确定上述测试目标的情绪信息加工倾向为负性情绪。
在该实现方式中，先观测上述测试目标的左右脑对上述正性情绪刺激产生脑电的电压差的潜伏期长短以及对上述负性情绪刺激产生脑电的电压差的潜伏期长短是否达到某个预设的阈值。当两个潜伏期的时长之差不大于该阈值，则进一步分析两个曲线图中最高点对应的纵坐标的绝对值的大小。该绝对值的大小同样可以量化其对正性情绪刺激或负性情绪 刺激的敏感程度，且绝对值越大，敏感程度越高。因此，可通过比较两个绝对值之间的大小，来确定该测试目标的情绪信息加工倾向。
在一个可选的实现方式中，上述分别获取测试目标在接受上述视觉刺激的过程中左脑与右脑对上述正性情绪刺激产生的脑电之间的第一电压差以及对上述负性情绪刺激产生的脑电之间的第二电压差，包括：获取上述测试目标的上述左脑与上述右脑对第一情绪刺激产生的脑电之间的第三电压差以及对第二情绪刺激产生的脑电之间的第四电压差，上述第一情绪刺激为呈现于第一区域内的上述正性情绪刺激；上述第二情绪刺激为呈现于第二区域内的上述正性情绪刺激；上述第一区域和所述第二区域分别为呈现上述视觉刺激的区域的左半区域和右半区域；获取上述测试目标的上述左脑与上述右脑对第三情绪刺激产生的脑电之间的第五电压差以及对第四情绪刺激产生的脑电之间的第六电压差，上述第三情绪刺激为呈现于上述第一区域内的上述负性情绪刺激；上述第四情绪刺激为呈现于上述第二区域内的上述负性情绪刺激；对上述第三电压差和上述第四电压差进行平均处理，得到上述第一电压差；对上述第五电压差和上述第六电压差进行平均处理，得到上述第二电压差。
在该实现方式中，先将所有上述视觉刺激包含的上述正性情绪刺激以及上述负性情绪刺激分类。应理解，由于其左右脑对刺激产生的脑电之间的电压差是由于其刺激出现在对侧视野的目标在单侧脑后区域所引起的脑电反应要比同侧视野目标所引起的脑电反应更负。举例说明，假设某个刺激呈现于上述测试目标的视野范围的偏左方向，则该测试目标的右脑对该刺激产生的脑电压比左脑对该刺激产生的脑电压更负，也就造成了左右脑的脑电之间的电压差。因此，我们将上述情绪刺激中的正性情绪刺激与负性情绪刺激按照其出现在上述测试目标的视野位置分类，分别获取上述测试目标的左右脑对不同类别的情绪刺激产生的脑电的电压差，为确保脑电数据的准确性和真实性，可以对得到的电压查进行叠加平均，得到该测试目标对上述正性情绪刺激以及上述负性情绪刺激的整体平均的电压差，该整体平均的电压差可更为准确地量化上述测试目标对上述正性情绪刺激以及上述负性情绪刺激的敏感程度。
第二方面，本申请实施例提供了一种情绪加工倾向的确定装置，所述确定装置包括：显示单元，用于呈现视觉刺激，所述视觉刺激为包括将正性情绪刺激与负性情绪刺激同时呈现的刺激；获取单元，用于分别获取测试目标在接受所述视觉刺激的过程中左脑与右脑对所述正性情绪刺激产生的脑电之间的第一电压差以及对所述负性情绪刺激产生的脑电之间的第二电压差；处理单元，用于生成第一曲线图与第二曲线图，所述第一曲线图为表征所述第一电压差在所述测试目标接受所述视觉刺激后的变化过程的曲线图，所述第二曲线图为表征所述第二电压差在所述测试目标接受所述视觉刺激后的变化过程的曲线图；确定单元，用于根据所述第一曲线图与所述第二曲线图中波幅的差异，确定所述测试目标的情绪加工倾向。
在一个可选的实现方式中，所述确定单元，具体用于将所述第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将所述第二曲线图中纵坐标的绝对值大于所述第一阈值的点中横坐标最小的坐标点确定为第二坐标点；在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值大于第二阈值，且所述第一坐标点的横坐标大于所述第二坐标点的横坐标的情况下，确定所述测试目标的情绪加工倾 向为正性情绪；在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值大于所述第二阈值，且所述第一坐标点的横坐标小于所述第二坐标点的横坐标的情况下，确定所述测试目标的情绪加工倾向为负性情绪。
在一个可选的实现方式中，所述确定单元，具体用于将所述第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将所述第二曲线图中纵坐标的绝对值大于所述第一阈值的点中横坐标最小的坐标点确定为第二坐标点；在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值不大于第二阈值，且所述第一曲线图中最高点的纵坐标的绝对值大于所述第二曲线图中最高点的纵坐标的绝对值的情况下，确定所述测试目标的情绪加工倾向为正性情绪；在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值不大于所述第二阈值，且所述第一曲线图中最高点的纵坐标的绝对值不大于所述第二曲线图中最高点的纵坐标的绝对值的情况下，确定所述测试目标的情绪加工倾向为负性情绪。
在一个可选的实现方式中，所述获取单元，具体用于获取所述测试目标的所述左脑与所述右脑对第一情绪刺激产生的脑电之间的第三电压差以及对第二情绪刺激产生的脑电之间的第四电压差，所述第一情绪刺激为呈现于第一区域内的所述正性情绪刺激；所述第二情绪刺激为呈现于第二区域内的所述正性情绪刺激；所述第一区域和所述第二区域分别为呈现所述视觉刺激的区域的左半区域和右半区域；获取所述测试目标的所述左脑与所述右脑对第三情绪刺激产生的脑电之间的第五电压差以及对第四情绪刺激产生的脑电之间的第六电压差，所述第三情绪刺激为呈现于所述第一区域内的所述负性情绪刺激；所述第四情绪刺激为呈现于第所述二区域内的所述负性情绪刺激；对所述第三电压差和所述第四电压差进行平均处理，得到所述第一电压差；对所述第五电压差和所述第六电压差进行平均处理，得到所述第二电压差。
第三方面，本申请实施例提供了一种计算机可读存储介质，该计算机存储介质中存储有计算机程序，该计算机程序包括程序指令，该程序指令当被处理器执行时使该处理器执行上述第一方面及任一种可选的实现方式的方法。
第四方面，本申请实施例提供了一种电子设备，该电子设备包括：存储器，用于存储程序；处理器，用于执行所述存储器存储的所述程序，当所述程序被执行时，所述处理器用于执行如上述第一方面以及任一种可选的实现方式的方法。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图作简单的介绍。
图1为本申请实施例提供的一种情绪加工倾向的确定系统的示意图；
图2为本申请实施例提供的一种情绪刺激范式的示意图；
图3为本申请实施例提供的另一种情绪刺激范式的示意图；
图4为本申请实施例提供的一种情绪加工倾向的确定方法的流程图；
图5为本申请实施例提供的又一种情绪刺激范式的示意图；
图6为本申请实施例提供的一种N2pc成分曲线的示意图；
图7为本申请实施例提供一种情绪加工倾向确定装置的结构示意图；
图8为本申请实施例提供的一种电子设备的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地描述。
本申请的说明书、权利要求书及附图中的术语“第一”和“第二”等仅用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备等，没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元等，或可选地还包括对于这些过程、方法、产品或设备等固有的其它步骤或单元。
在本文中提及的“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员可以显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请中，“至少一个(项)”是指一个或者多个，“多个”是指两个或两个以上，“至少两个(项)”是指两个或三个及三个以上，“和/或”，用于描述关联对象的关联关系，表示可以存在三种关系，例如，“A和/或B”可以表示：只存在A，只存在B以及同时存在A和B三种情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”。
本发明实施例提供了情绪加工倾向的确定方法。为了更清楚地描述本发明的方案，下面先介绍一些本申请实施例提供的情绪加工倾向的确定方法所涉及的知识。
脑电：脑电(Electroencephalogram，EEG)是一种使用电生理指标记录大脑活动的方法，大脑在活动时，大量神经元同步发生的突触后电位经总和后形成的。它记录大脑活动时的电波变化，是脑神经细胞的电生理活动在大脑皮层或头皮表面的总体反映。人的大脑是由数以万计的神经元组成的，脑电波就是这些神经元之间的活动产生的电信号，这些神经元之间的连接有的是兴奋的，有的是抑制的；思维活动就是反应这些神经元之间的联系，大脑中的神经元会接收来自其他神经元的信号，当这些信号的能量积累量超过一定的阈值时，就会产生脑电波，为了检测到脑电波，人们通常将电极放置在人的头皮上来检测脑电波信号，再应用相关的设备进行脑波的收集与处理。
脑电仪：脑电仪是指记录自发脑电图的专用仪器。主要包括放大、记录、显示器与闪光灯，并含电极或电极帽、导电膏、清洁剂等消耗品。有些具有脑电分析功能。一般可同时接收8～128导脑电信号。其放大部分除具有放大脑电信号的功能外，还具有滤波功能，时间常数与灵敏度可以调节。
N2pc：N2pc是一种与空间选择性注意密切相关的脑诱发电位成分，反映了对当前任务相关刺激所进行的空间选择加工。其中，“N”代表负波(negative)，“2”是指该成分大约出现在刺激呈现后的200ms至300ms之间，而“pc”是指它的头皮分布位置目标刺激的对侧脑后 区域N2pc是一种较大的单侧脑后负波，其波幅常被用作对目标刺激注意分配量的指标，而其潜伏期则反映了对目标刺激注意分配的时间点。
情绪信息加工倾向:不同个体对不同情绪色彩的刺激的加工倾向性存在差异，例如，有的个体可能更敏感于(优先或更强烈地或更频繁地)加工负性情绪刺激(引发愤怒、悲伤等情绪的刺激)，而另一些个体可能更敏感于正性情绪刺激(引发舒适、愉悦情绪的刺激)。情绪信息加工倾向可反映个体更敏感与负性情绪刺激还是正性情绪刺激。
接下来先介绍一种本申请实施例提供的情绪加工倾向的确定系统的示意图，请参阅图1。
如图1所示，该情绪加工倾向的确定系统由终端设备101以及脑电设备103组成。该终端设备101可以是电脑、手机、平板或其他具备可视化功能的设备。该脑电设备可以是脑电信号采集器、脑电仪等脑电设备。在实际的应用场景中，该终端101设备负责呈现视觉刺激，在测试目标102接受该视觉刺激后，该脑电设备103通过其附着于该测试目标102的大脑皮层上的电极获取该测试目标102的大脑所产生的脑电的相关数据，并将该相关数据传输给所述终端设备101保存，该终端设备101可对上述相关数据进项分析处理，得出该测试目标102的情绪加工倾向。应理解，由于人脑的后部脑区主管视觉加工，对位于单侧视野中的刺激所产生的脑电差异也由后脑产生，因此，上述脑电仪中的用于采集脑电信号的电极在使用时需使用覆盖人脑后部脑区。
在一个可选的实现方式中，上述系统可以包含多个与终端设备101类似的设备。在实际的应用场景中，单个终端设备可以只负责呈现视觉刺激，后续对脑电的数据分析工作可由另一终端设备完成。
在一个可选的实现方式中，上述脑电设备103可具备一定的对脑电数据的分析处理能力，在其获取到上述测试目标102的大脑所产生的脑电的相关数据后，该脑电设备可以对该相关数据进行如放大、滤波等预处理操作，将预处理后得到的脑电数据传送至上述终端设备101。
接下来介绍一种本申请实施例提供的一种情绪刺激范式的示意图，该情绪刺激范式可结合如图1中所包含的终端设备101对上述测试目标进行情绪加工倾向的确定。请参阅图2。
图2为本申请实施例提供的一种情绪刺激范式的示意图。如图2所示，图2中试次20和试次21均为包括多个人脸图像的刺激，其中人脸201为愤怒的人脸面孔，人脸211为开心的人脸面孔，人脸202和人脸212为没有明显表情的人脸面孔，“+”为中央注视点。心理学上将如人脸201所示的情绪刺激称为负性情绪刺激，将如人脸211所示的情绪刺激称为正性情绪刺激，将如人脸202或212所示的情绪刺激称为中性情绪刺激。如图2所示，试次20只包含一个负性情绪刺激的面孔，其余的均为如202一样的中性情绪刺激面孔，我们将其称为负性刺激；同理，试次21只包含一个正性情绪刺激的面孔，其余的均为如212一样的中性情绪刺激面孔，我们将其称为正性刺激。
利用上述情绪刺激范式对目标进行测试，并结合具备可视化功能的终端设备(可参考图1中终端设备101)可粗略的获知该目标的情绪信息加工倾向。具体实施过程如下：
在测试之前，为测试目标设置测试任务，要求该测试目标找出正性刺激(请参考试次21)所包含的人脸中表现为开心的人脸面孔(请参考211)，或找出负性刺激(请参考试次20)所包含的人脸中表现为愤怒的人脸面孔(请参考201)。测试开始后，上述终端设备将一定数量的负性刺激的试次(请参考试次20)和正性刺激的试次(请参考试次21)随机呈现给该目标，每次只呈现一张试次且呈现试次的时间有限制，上述测试目标需在限定的时间内找出试次中的正性情绪刺激的人脸面孔或者负性情绪刺激的人脸面孔。对任一试次，上述终端设备均记录该测试目标完成任务的时长和完成情况，在该测试目标对所有的试次均完成作答后，该终端设备将分别统计该测试目标查找正性刺激中正性情绪刺激的面孔的平均时长、正确率以及该测试目标查找负性刺激中负性情绪刺激的面孔的平均时长和正确率，根据二者时长的大小以及正确率的高低来判定该测试目标的情绪信息加工倾向为正性情绪或负性情绪。举例说明，若该测试目标对100张试次(其中50张试次为正性刺激，另50张试次为负性刺激)完成了搜索任务，上述终端设备记录其对每张试次的搜索时长和搜索情况，并进行分析计算之后，得出该测试目标查找正性刺激中正性情绪刺激的面孔的平均时长为2.5秒，且其找出正性刺激中正性情绪刺激的面孔的正确率为99％；但其查找负性刺激中负性情绪刺激的面孔的平均时长为2.65秒，且其找出正性刺激中正性情绪刺激的面孔的正确率为96％，则在某种程度上可以认为该测试目标的情绪信息加工倾向为正性情绪。
应理解，图2中的试次20和试次21只是正性刺激或负性刺激的其中一种表现形式，其还可以有其他多种表现形式。例如，图中的人脸可以替换为其他图像，只要图像引起的人的情绪可明显区分为正性、负性和中性即可；此外，试次中每个图像的排列方式可以是不同的，只需试次中所有的图像均匀地分布在呈现上述刺激的区域中。虽然正性刺激和负性刺激的表现形式有多种，但在同一测试中，其形式应该是唯一的。也就是说，在呈现给上述测试目标的100张试次中，任一张试次包含的图像都是只能是人脸，且一张试次中的图像的排列方式都为圈状排列。
利用上述刺激范式对个体进行测验，通过比较个体对正性刺激和负性刺激相关的反应时和正确率的差异，虽然能够在某种程度上反映出个体的情绪加工倾向，但是根据以往的经验来看，对同一个体的进行多次测试后，每次得出的结果并不具备一致性。究其原因，可能是测试目标进行视觉刺激之前已被告知之后的试次中会存在正性情绪刺激以及负性情绪刺激，并且刺激范式中只包含将中性情绪刺激和正性情绪刺激同时呈现的刺激以及将中性情绪刺激和负性情绪刺激同时呈现的刺激，并不包括将负性情绪刺激和正性情绪刺激同时呈现的刺激。此外，将测试目标查找正性刺激中正性情绪的面孔的平均时长、正确率以及该测试目标查找负性刺激中负性情绪的面孔的平均时长和正确率作为指标而获取的推论在一定程度上还是缺乏客观性。因此，需研究更为准确和客观的情绪加工倾向的确定方法。
针对上述方法的不足，本申请实施例采用创新的刺激范式，对测试任务进行了创新(不再为从多个中性情绪刺激中找出正性情绪刺激或负性情绪刺激)，并结合脑电指标来量化个体对不同情绪刺激的加工偏向，通过观测个体在接受竞争性刺激(即负性情绪面孔和正性情绪面孔同时呈现的刺激)下，对正性情绪刺激和负性情绪刺激时的脑电反应，观测的主要的脑电指标为N2pc成分(即左右脑之间的电压差)，通过分析N2pc成分的特征信息来 量化个体对不同情绪刺激的加工偏向程度，准确判断个体的情绪加工倾向。接下来上述方法所使用的刺激范式进行介绍。
请参阅图3，图3为本申请实施例提供的另一种情绪刺激范式的示意图。该情绪刺激范式可以作为上述对图1的说明中的视觉刺激，并结合如图1所示的系统较为准确地获知测试目标的情绪加工倾向。如图3所示，该刺激范式选择人脸作为情绪刺激的载体，每一个竞争性刺激中都包含一个正性情绪刺激(开心的人脸，如人脸3011)和一个负性情绪刺激(愤怒的人脸，如人脸3012)以及多个中性情绪刺激(没有特殊表情的人脸，如301中用圆形虚线框框选的人脸)。图中“+”为向测试目标呈现该刺激该测试时目标的中央注视点，为方便读者理解，图3中用竖直的虚线将呈现该竞争性刺激的呈现区域均分为左半区域以及右半区域；应理解，该虚线只是为了方便读者理解，在实际的应用场景中，该虚线是不存在的。在本申请实施例中，我们将上述竞争性刺激按其正性情绪刺激以及负性情绪刺激在呈现区域中的位置情况分为六种，包括：
1.正性情绪刺激以及负性情绪刺激均位于在上述呈现区域左半区域的竞争性刺激；例如图3中刺激301，其开心的人脸3011以及愤怒的人脸3012均位于虚线左侧；
2.正性情绪刺激以及负性情绪刺激均位于上述呈现区域右半区域的竞争性刺激；例如图3中刺激302，其开心的人脸3021以及愤怒的人脸3022均位于虚线右侧；
3.正性情绪刺激位于上述呈现区域正中间，负性刺激位于上述呈现区域右侧的竞争性刺激；例如图3中刺激303，其开心的人脸3031位于虚线上，愤怒的人脸3032位于虚线右侧；
4.正性情绪刺激位于上述呈现区域正中间，负性刺激位于上述呈现区域左侧的竞争性刺激；例如图3中刺激304，其开心的人脸3041位于虚线上，愤怒的人脸3042位于虚线左侧；
5.负性情绪刺激位于上述呈现区域正中间，正性刺激位于上述呈现区域左侧的竞争性刺激；例如图3中刺激305，其愤怒的人脸3052位于虚线上，开心的人脸3051位于虚线左侧；
6.负性情绪刺激位于上述呈现区域正中间，正性刺激位于上述呈现区域右侧的竞争性刺激；例如图3中刺激306，其愤怒的人脸3062位于虚线上，开心的人脸3061位于虚线右侧；
应理解，图3中的301至306只是上述6个竞争性刺激类别的具体形式，在实际的测试中，测试目标将接受上百个甚至更多的与301至306所示的刺激种类类似的刺激，且均可按照其包含的正性情绪刺激(即开心的人脸)以及负性情绪刺激(即愤怒的人脸)的呈现位置将其归于上述6类竞争性刺激中的某一类。
在呈现图3中的刺激之前，将如图1中所示的脑电仪的电极覆盖测试目标的后部脑区，而后测试目标将被告知接受图3中的刺激时需要完成的测试任务，即在图2中刺激所呈现的人脸中找出性别或年龄不同于其余人脸的人脸；以图3中刺激301为例说明，在向测试目标呈现刺激301时，测试目标需要在规定的时长内观察刺激301中的人脸，并找出其中六个人脸中性别或者年龄不同于其余五人的人脸，在该测试目标观察刺激301中的人脸时，同时利用脑电仪获取该测试目标的脑电信息。如图3的刺激301所示，刺激301中用圆形 虚线框选中的人脸即为目标人脸，其性别或者年龄不同于其余五个人脸。应理解，如图3中刺激301至306中的圆形虚线框只是为了方便读者理解，其在实际的应用场景中是不存在的。
在一些实施例中，图3所示的刺激范式的组合还可以包括不包含目标人脸的竞争性刺激。也就是说，在该实施例中，竞争性刺激同样可以分为上述6类，其中每一类还可以包括存在目标人脸(即性别或年龄不同于其余人脸的人脸)的刺激以及不包含目标人脸的刺激，测试任务也可以设置为判断刺激中是否存在目标人脸。
下面介绍一种本申请实施例提供的一种情绪加工倾向的确定方法的流程图，该方法可利用如图3所示的刺激范式组合，并结合如图1所示的系统较为准确的获知测试目标的情绪加工倾向，获知的结果客观可靠。
请参阅图4，图4为本申请实施例提供的一种情绪加工倾向的确定方法的流程图。该方法可包括：
401、倾向确定装置呈现视觉刺激，该视觉刺激为包括正性情绪刺激与负性情绪刺激的刺激。
上述倾向确定装置可以是电脑、手机、平板等具备可视化功能以及数据处理分析功能的终端设备(可参考图1中终端设备101)。上述视觉刺激为同时包含正性情绪刺激和负性情绪刺激的图像，该视觉刺激可以呈现在上述倾向确定装置的显示屏上。为排除色彩以及清晰度对测试目标的判断的影响，在一些实施例中，在呈现该视觉刺激之前，可对该视觉刺激所使用的图像进行预处理，使其呈现时为清晰且黑白的图像。该视觉刺激按其正性情绪刺激和负性情绪刺激的呈现位置可分为6种(具体可参考对图3的说明中的分类)。
402、上述倾向确定装置获取测试目标在接受视觉刺激的过程中左脑与右脑对上述正性情绪刺激产生的脑电之间的第一电压差以及对上述负性情绪刺激产生的脑电之间的第二电压差。
上述第一电压差以及上述第二电压差在心理学上称为N2pc。N2pc是一种人脑脑电的对侧波形减去同侧波形得到的差异波，具体来说就是出现在对侧视野的刺激在单侧脑后区域所引起的脑电反应要比同侧视野目标所引起的脑电反应更负。相对于人脑的左半球而言，左侧视野的目标即为同侧目标，而右侧视野的目标即为对侧目标；同理，相对于人脑的右半球而言，右侧视野的目标即为同侧目标，而左侧视野的目标即为对侧目标。因此，当刺激出现在上述测试目标的左侧视野时，其右脑产生的脑电反应相比左脑的脑电反应更负，此时N2pc为右脑脑电减去左脑脑电；同理，当刺激出现在上述测试目标的右侧视野时，其左脑产生的脑电反应相比右脑的脑电反应更负，此时N2pc为左脑脑电减去右脑脑电。
上述获取脑电的电压差可通过脑电设备(可参考图1中的脑电设备101)完成。以图3中的刺激范式为例进行说明。应理解，当正性情绪刺激或负性情绪刺激出现在测试目标视野的居中位置，例如图3所示的刺激的虚线上时，大脑对其不会产生N2pc成分或者说产生的N2pc成分可忽略不计。因此，上述获取测试目标在接受视觉刺激的过程中左脑与右脑对上述正性情绪刺激产生的脑电之间的第一电压差，实际只获取上述测试目标对正性情绪刺激不在虚线位置上的刺激产生的脑电。具体来说，即为获取测试目标对图3中刺激301、刺激302、刺激305以及刺激306所述类别的竞争性刺激产生的脑电，此外由于在刺激301 以及刺激305所属的类别中，正性情绪刺激位于虚线左侧(即呈现时位于目标的视野左侧)；而在刺激302以及刺激306所属的类别中，正性情绪刺激位于虚线右侧(即呈现时位于目标的视野右侧)，因此在上述脑电设备获取上述测试目标的脑电信息之后，上述倾向确定装置先获取由该脑电设备提取的上述测试目标的左脑以及右脑对刺激301以及刺激305所属类别的刺激中的上述正性情绪刺激产生的脑电数据，然后用右脑的脑电减去左脑的脑电得到一个电压差，之后获取上述测试目标的左脑以及右脑对刺激302以及刺激306所属类别的刺激中的上述正性情绪刺激产生的脑电数据，然后用左脑的脑电减去右脑的脑电得到另一个电压差，将上述两个电压差叠加平均，得到上述第一电压差，即大脑整体对正性情绪刺激N2pc成分。同理，对于上述获取测试目标在接受视觉刺激的过程中左脑与右脑对上述负性情绪刺激产生的脑电之间的第二电压差，上述倾向确定装置将先提取上述测试目标的左脑以及右脑对刺激301以及刺激304所属类别的刺激中的上述负性情绪刺激产生的脑电，然后用右脑的脑电减去左脑的脑电得到一个电压差，之后提取上述测试目标的左脑以及右脑对刺激302以及刺激303所属类别的刺激中的上述负性情绪刺激产生的脑电，然后用左脑的脑电减去右脑的脑电得到另一个电压差，将上述两个电压差叠加平均，得到上述第二电压差，即大脑整体对负性情绪刺激N2pc成分。
403、上述倾向确定装置生成第一曲线图与第二曲线图；该第一曲线图为表征所述第一电压差变化过程的曲线图，该第二曲线图为表征所述第二电压差变化过程的曲线图；
同样以图3中的刺激范式以及对步骤402中的说明来进行解释。步骤402中得到的第一电压差以及第二电压差可以理解为某一时刻左右脑的电压差，而事实上在上述测试目标接受刺激后，左右脑产生的N2pc成分时刻在发生变化。因此，可以利用算法将上述两个电压差自测试目标接受刺激开始所产生的N2pc成分的变化过程生成曲线图，即上述第一曲线图以及第二曲线图。
在一些实施例中，在步骤402中，该倾向确定装置可以先生成上述测试目标的左脑以及右脑对刺激301以及刺激305所属类别的刺激中的上述正性情绪刺激产生的N2pc随时间变化的第一正性曲线图，以及对刺激302以及刺激306所属类别的刺激中的上述正性情绪刺激产生的脑电的N2pc随时间变化的第二正性曲线图；同理，上述倾向确定装置可以先生成上述测试目标的左脑以及右脑对刺激301以及刺激304所属类别的刺激中的上述负性情绪刺激产生的N2pc随时间变化的第一负曲性线图，以及对刺激302以及刺激303所属类别的刺激中的上述正性情绪刺激产生的脑电的N2pc随时间变化的第二负性曲线图；在步骤403中，只需对上述第一正性曲线图以及第二正性曲线图叠加平均，即可得到上述第一曲线图；同理对上述第一负性曲线图以及第二负性曲线图叠加平均，即可得到上述第二曲线图。
404、上述倾向确定装置根据上述第一曲线图与上述第二曲线图中波幅的差异，确定上述测试目标的情绪加工倾向。
得到上述第一曲线图以及上述第二曲线图之后，上述倾向确定装置将分析两个曲线图中首个纵坐标的绝对值大于或等于某个阈值的点。应理解，在上述测试目标接受刺激开始的0-150ms的内，N2pc的数值较小，此时即可认为N2pc处于潜伏期。一般在接受刺激后150s-300ms的时间内，N2pc的值会急剧稳定上升达到峰值后再下降。因此，在对上述两条 曲线图的分析过程中，先通过找寻两个曲线图中首个纵坐标的绝对值大于或等于某个阈值的点，该坐标点的横坐标可以认为是N2pc开始出现的时刻。若该两个坐标点的横坐标的差值的绝对值大于某个阈值，比如第一曲线中的点的横坐标减去大于第二曲线中的点的横坐标，所得的值为的绝对值大于10，比如为-11，即上述测试目标对正性情绪刺激的N2pc的时间比对上述负性情绪刺激产生N2pc的时间要早11ms，则可以认为其对正性情绪更为敏感，则判定其情绪加工倾向为正性情绪；同理，若为差值为11，即上述测试目标对负性情绪刺激的N2pc的时间比对上述正性情绪刺激产生N2pc的时间要早11ms，则可以认为其对负性情绪更为敏感，则判定其情绪加工倾向为负性情绪。然而，当上述两个坐标点的横坐标差值的绝对值不大于上述阈值时，则认为上述测试目标对正性情绪刺激的N2pc的时间和对上述负性情绪刺激产生N2pc的时间没有明显的区别。在这种情况下，将接着通过比较两条曲线中的上述峰值的绝对值的大小来获知其情绪信息的加工偏向，若上述第一曲线的峰值的绝对值大于上述第二曲线的峰值的绝对值，则判定其情绪加工倾向为正性情绪；反之，则判定其情绪加工倾向为负性情绪。
在一个可选的实现方式中，可以分别利用上述竞争性刺激的刺激范式与上述图2中的正性刺激以及负性刺激的刺激范式组合为新的刺激范式(请参阅图5)，并采用如图4所示的方法分别测试上述新的刺激范式中的两个范式对测试目标的刺激效果，来对比两个范式之间的优良性。
下面介绍本申请实施例提供的又一种情绪刺激范式的示意图，请参阅图5。
如图5所示，刺激501和刺激504可类比图3所示的竞争性刺激，刺激502和刺激505可类比图2中的负性刺激，刺激503和刺激506可类比图2所示的正性刺激。其中矩形虚线框框选的为正性情绪刺激(开心的人脸)或者负性情绪刺激(愤怒的人脸)，椭圆形虚线框框选的为测试任务的目标人脸(刺激中不同性别的人脸)，“+”为测试目标的中心注视点。应理解，上述矩形虚线框以及椭圆形虚线框是为了方便读者理解，在实际的应用场景中并不存在。
利用图4所述的方法提取上述测试目标的大脑对刺激501和刺激505所示的竞争性刺激中正性情绪刺激产生的N2pc成分曲线图(请参阅图6中实曲线601)以及负性情绪刺激产生的N2pc成分曲线图(请参阅图6中实曲线602)，和对刺激502和刺激505中的负性情绪刺激产生的N2pc成分曲线图(请参阅图6中虚曲线603)，和对刺激503和刺激506中正性情绪刺激产生的N2pc成分曲线图(请参阅图6中虚曲线604)，对上述四条曲线进行比对分析，可得出上述测试目标的情绪信息加工偏向以及上述竞争性刺激范式和正性刺激以及负性刺激范式之间的优良性。
接下来请参阅图6。图6为本申请实施例提供的一种N2pc成分曲线的示意图。如图6所示，实曲线601为测试目标对图5中竞争性刺激中正性情绪刺激产生的N2pc成分曲线图；实曲线602为上述测试目标对图5中竞争性刺激中负性情绪刺激产生的N2pc成分曲线图；虚曲线603为上述测试目标对图5中负性刺激中负性情绪刺激产生的N2pc成分曲线图；虚曲线604为上述测试目标对图5中正性刺激中正性情绪刺激产生的N2pc成分曲线图；其中矩形虚线框框选的曲线段为N2pc成分显现最明显的时段。通过对比实曲线601和实曲线602可知，上述测试目标对正性情绪刺激产生的N2pc成分的时间明显早于对负性情绪刺激 产生的N2pc的时间，并且对正性情绪刺激产生的N2pc成分的峰值明显大于对负性情绪刺激产生的N2pc的峰值，因此，可以获知该测试目标的情绪信息加工倾向为正性情绪。但是，单纯比较虚曲线603和虚曲线604，并不能看出两条虚曲线之间的明显差异，也就是说，其使用的正性刺激以及负性刺激范式所产生的效果并不明显，也不能用来获知上述测试目标的情绪信息加工倾向。因此，对于图4所示的方法而言，竞争性刺激范式的优良性显然高于正性刺激以及负性刺激范式。
下面介绍本申请实施例提供的一种情绪加工倾向确定装置的结构示意图，请参阅图7。
图7为本申请实施例提供的一种情绪加工倾向确定装置的结构示意图。如图7所示，该装置包括：
显示单元，用于呈现视觉刺激，该视觉刺激为包括正性情绪刺激与负性情绪刺激的刺激；
获取单元，用于分别获取测试目标在接受该视觉刺激的过程中左脑与右脑对该正性情绪刺激产生的脑电之间的第一电压差以及对该负性情绪刺激产生的脑电之间的第二电压差；
处理单元，用于生成第一曲线图与第二曲线图，该第一曲线图为表征该第一电压差在该测试目标接受该视觉刺激后的变化过程的曲线图，该第二曲线图为表征该第二电压差在该测试目标接受该视觉刺激后的变化过程的曲线图；
确定单元，用于根据该第一曲线图与该第二曲线图中波幅的差异，确定该测试目标的情绪加工倾向。
在一个可选的实现方式中，该确定单元，具体用于将该第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将该第二曲线图中纵坐标的绝对值大于该第一阈值的点中横坐标最小的坐标点确定为第二坐标点；在该第一坐标点的横坐标与该第二坐标点的横坐标的差值的绝对值大于第二阈值，且该第一坐标点的横坐标大于该第二坐标点的横坐标的情况下，确定该测试目标的情绪加工倾向为正性情绪；在该第一坐标点的横坐标与该第二坐标点的横坐标的差值的绝对值大于该第二阈值，且该第一坐标点的横坐标小于该第二坐标点的横坐标的情况下，确定该测试目标的情绪加工倾向为负性情绪。
在一个可选的实现方式中，该确定单元，具体用于将该第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将该第二曲线图中纵坐标的绝对值大于该第一阈值的点中横坐标最小的坐标点确定为第二坐标点；在该第一坐标点的横坐标与该第二坐标点的横坐标的差值的绝对值不大于该第二阈值，且该第一曲线图中最高点的纵坐标的绝对值大于该第二曲线图中最高点的纵坐标的绝对值的情况下，确定该测试目标的情绪加工倾向为正性情绪；在该第一坐标点的横坐标与该第二坐标点的横坐标的差值的绝对值不大于该第二阈值，且该第一曲线图中最高点的纵坐标的绝对值不大于该第二曲线图中最高点的纵坐标的绝对值的情况下，确定该测试目标的情绪加工倾向为负性情绪。
在一个可选的实现方式中，该获取单元，具体用于获取该测试目标的左脑与右脑对第一情绪刺激产生的脑电之间的第三电压差以及对第二情绪刺激产生的脑电之间的第四电压差，该第一情绪刺激为呈现于第一区域内的该正性情绪刺激；该第二情绪刺激为呈现于第 二区域内的该正性情绪刺激；该第一区域和该第二区域分别为呈现该视觉刺激的区域的左半区域和右半区域；获取该测试目标的左脑与右脑对第三情绪刺激产生的脑电之间的第五电压差以及对第四情绪刺激产生的脑电之间的第六电压差，该第三情绪刺激为呈现于该第一区域内的该负性情绪刺激；该第四情绪刺激为呈现于第该二区域内的该负性情绪刺激；对该第三电压差和该第四电压差进行平均处理，得到该第一电压差；对该第五电压差和该第六电压差进行平均处理，得到该第二电压差。
图8为本申请实施例提供的一种电子设备的结构示意图。如图8所示，该电子设备80包括处理器801、存储器802、显示器803和通信接口804；该处理器801、存储器802、显示器803和通信接口804通过总线805相互连接。图8中的电子设备可以为前述实施例中的倾向确定装置。
存储器802包括但不限于是随机存储记忆体(random access memory，RAM)、只读存储器(read-only memory，ROM)、可擦除可编程只读存储器(erasable programableread only memory，EPROM)、或便携式只读存储器(compact disc read-only memory，CDROM)，该存储器802用于相关指令及数据。通信接口804用于接收和发送数据。
处理器801可以是一个或多个中央处理器(central processing unit，CPU)，在处理器801是一个CPU的情况下，该CPU可以是单核CPU也可以是多核CPU。该显示器803可以为电脑的显示器或者手机或平板的显示屏。上述实施例中由倾向确定装置所执行的步骤可以基于该图8所示的电子设备的结构。具体的，处理器801可实现图7中各单元的功能。
在本申请的实施例中提供另一种计算机可读存储介质，上述计算机可读存储介质存储有计算机程序，上述计算机程序被处理器执行时实现：呈现视觉刺激，该视觉刺激为包括将正性情绪刺激与负性情绪刺激同时呈现的刺激；分别获取测试目标在接受该视觉刺激的过程中左脑与右脑对上述正性情绪刺激产生的脑电之间的第一电压差以及对上述负性情绪刺激产生的脑电之间的第二电压差；生成第一曲线图与第二曲线图，该第一曲线图为表征上述第一电压差在上述测试目标接受上述视觉刺激后的变化过程的曲线图，该第二曲线图为表征上述第二电压差在上述测试目标接受上述视觉刺激后的变化过程的曲线图；根据该第一曲线图与该第二曲线图中波幅的差异，确定上述测试目标的情绪加工倾向。
本申请实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行前述实施例所提供的情绪加工倾向的确定方法。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种情绪加工倾向的确定方法，其特征在于，包括：
    呈现视觉刺激，所述视觉刺激为包括将正性情绪刺激与负性情绪刺激同时呈现的刺激；
    分别获取测试目标在接受所述视觉刺激的过程中左脑与右脑对所述正性情绪刺激产生的脑电之间的第一电压差以及对所述负性情绪刺激产生的脑电之间的第二电压差；
    生成第一曲线图与第二曲线图，所述第一曲线图为表征所述第一电压差在所述测试目标接受所述视觉刺激后的变化过程的曲线图，所述第二曲线图为表征所述第二电压差在所述测试目标接受所述视觉刺激后的变化过程的曲线图；
    根据所述第一曲线图与所述第二曲线图中波幅的差异，确定所述测试目标的情绪加工倾向。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述第一曲线图与所述第二曲线图中波幅的差异，确定所述测试目标的情绪加工倾向，包括：
    将所述第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将所述第二曲线图中纵坐标的绝对值大于所述第一阈值的点中横坐标最小的坐标点确定为第二坐标点；
    在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值大于第二阈值，且所述第一坐标点的横坐标大于所述第二坐标点的横坐标的情况下，确定所述测试目标的情绪加工倾向为正性情绪；
    在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值大于所述第二阈值，且所述第一坐标点的横坐标小于所述第二坐标点的横坐标的情况下，确定所述测试目标的情绪加工倾向为负性情绪。
  3. 根据权利要求1所述的方法，其特征在于，所述根据所述第一曲线图与所述第二曲线图中波幅的差异，确定所述测试目标的情绪加工倾向，包括：
    将所述第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将所述第二曲线图中纵坐标的绝对值大于所述第一阈值的点中横坐标最小的坐标点确定为第二坐标点；
    在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值不大于第二阈值，且所述第一曲线图中最高点的纵坐标的绝对值大于所述第二曲线图中最高点的纵坐标的绝对值的情况下，确定所述测试目标的情绪加工倾向为正性情绪；
    在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值不大于所述第二阈值，且所述第一曲线图中最高点的纵坐标的绝对值不大于所述第二曲线图中最高点的纵坐标的绝对值的情况下，确定所述测试目标的情绪加工倾向为负性情绪。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述分别获取测试目标在接受所述视觉刺激的过程中左脑与右脑对所述正性情绪刺激产生的脑电之间的第一电压差以及对所述负性情绪刺激产生的脑电之间的第二电压差，包括：
    获取所述测试目标的所述左脑与所述右脑对第一情绪刺激产生的脑电之间的第三电压差以及对第二情绪刺激产生的脑电之间的第四电压差，所述第一情绪刺激为呈现于第一区域内的所述正性情绪刺激；所述第二情绪刺激为呈现于第二区域内的所述正性情绪刺激；所述第一区域和所述第二区域分别为呈现所述视觉刺激的区域的左半区域和右半区域；
    获取所述测试目标的所述左脑与所述右脑对第三情绪刺激产生的脑电之间的第五电压差以及对第四情绪刺激产生的脑电之间的第六电压差，所述第三情绪刺激为呈现于所述第一区域内的所述负性情绪刺激；所述第四情绪刺激为呈现于所述第二区域内的所述负性情绪刺激；
    对所述第三电压差和所述第四电压差进行平均处理，得到所述第一电压差；
    对所述第五电压差和所述第六电压差进行平均处理，得到所述第二电压差。
  5. 一种情绪加工倾向的确定装置，其特征在于，包括：
    显示单元，用于呈现视觉刺激，所述视觉刺激为包括将正性情绪刺激与负性情绪刺激同时呈现的刺激；
    获取单元，用于分别获取测试目标在接受所述视觉刺激的过程中左脑与右脑对所述正性情绪刺激产生的脑电之间的第一电压差以及对所述负性情绪刺激产生的脑电之间的第二电压差；
    处理单元，用于生成第一曲线图与第二曲线图，所述第一曲线图为表征所述第一电压差在所述测试目标接受所述视觉刺激后的变化过程的曲线图，所述第二曲线图为表征所述第二电压差在所述测试目标接受所述视觉刺激后的变化过程的曲线图；
    确定单元，用于根据所述第一曲线图与所述第二曲线图中波幅的差异，确定所述测试目标的情绪加工倾向。
  6. 根据权利要求5所述的单元，其特征在于，
    所述确定单元，具体用于将所述第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将所述第二曲线图中纵坐标的绝对值大于所述第一阈值的点中横坐标最小的坐标点确定为第二坐标点；在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值大于第二阈值，且所述第一坐标点的横坐标大于所述第二坐标点的横坐标的情况下，确定所述测试目标的情绪加工倾向为正性情绪；在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值大于所述第二阈值，且所述第一坐标点的横坐标小于所述第二坐标点的横坐标的情况下，确定所述测试目标的情绪加工倾向为负性情绪。
  7. 根据权利要求5所述的装置，其特征在于，
    所述确定单元，具体用于将所述第一曲线图中纵坐标的绝对值大于第一阈值的点中横坐标最小的坐标点确定为第一坐标点，将所述第二曲线图中纵坐标的绝对值大于所述第一阈值的点中横坐标最小的坐标点确定为第二坐标点；在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值不大于第二阈值，且所述第一曲线图中最高点的纵坐标 的绝对值大于所述第二曲线图中最高点的纵坐标的绝对值的情况下，确定所述测试目标的情绪加工倾向为正性情绪；在所述第一坐标点的横坐标与所述第二坐标点的横坐标的差值的绝对值不大于所述第二阈值，且所述第一曲线图中最高点的纵坐标的绝对值不大于所述第二曲线图中最高点的纵坐标的绝对值的情况下，确定所述测试目标的情绪加工倾向为负性情绪。
  8. 根据权利要求5至7任一项所述的装置，其特征在于，
    所述获取单元，具体用于获取所述测试目标的所述左脑与所述右脑对第一情绪刺激产生的脑电之间的第三电压差以及对第二情绪刺激产生的脑电之间的第四电压差，所述第一情绪刺激为呈现于第一区域内的所述正性情绪刺激；所述第二情绪刺激为呈现于第二区域内的所述正性情绪刺激；所述第一区域和所述第二区域分别为呈现所述视觉刺激的区域的左半区域和右半区域；获取所述测试目标的所述左脑与所述右脑对第三情绪刺激产生的脑电之间的第五电压差以及对第四情绪刺激产生的脑电之间的第六电压差，所述第三情绪刺激为呈现于所述第一区域内的所述负性情绪刺激；所述第四情绪刺激为呈现于第所述二区域内的所述负性情绪刺激；对所述第三电压差和所述第四电压差进行平均处理，得到所述第一电压差；对所述第五电压差和所述第六电压差进行平均处理，得到所述第二电压差。
  9. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序，所述计算机程序包括程序指令，所述程序指令当被处理器执行时，所述处理器执行如权利要求1至4任意一项所述的方法。
  10. 一种电子设备，其特征在于，包括：存储器，用于存储程序；处理器，用于执行所述存储器存储的所述程序，当所述程序被执行时，所述处理器用于执行如权利要求1至4中任一项所述的方法。
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