EP3998945A1 - Procédé et système de test de la cognition par traitement de la réaction d'un sujet a des stimuli - Google Patents
Procédé et système de test de la cognition par traitement de la réaction d'un sujet a des stimuliInfo
- Publication number
- EP3998945A1 EP3998945A1 EP20753995.8A EP20753995A EP3998945A1 EP 3998945 A1 EP3998945 A1 EP 3998945A1 EP 20753995 A EP20753995 A EP 20753995A EP 3998945 A1 EP3998945 A1 EP 3998945A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- subject
- stimuli
- difficulty
- response
- reaction time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
- A61B5/162—Testing reaction times
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
- A61B5/163—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state by tracking eye movement, gaze, or pupil change
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
- A61B5/165—Evaluating the state of mind, e.g. depression, anxiety
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/40—Detecting, measuring or recording for evaluating the nervous system
- A61B5/4076—Diagnosing or monitoring particular conditions of the nervous system
- A61B5/4088—Diagnosing of monitoring cognitive diseases, e.g. Alzheimer, prion diseases or dementia
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/74—Details of notification to user or communication with user or patient; User input means
- A61B5/7475—User input or interface means, e.g. keyboard, pointing device, joystick
- A61B5/748—Selection of a region of interest, e.g. using a graphics tablet
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/20—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems
Definitions
- a system for testing cognition by processing a subject's response to stimuli is provided.
- the invention also relates to a method implemented in this system.
- the method and the system relate to the field of neuropsychology and neurosciences and allow testing of certain cognitive abilities involved in the reaction to the difficulty of a user, in order to aid in the evaluation of the cognitive functioning relating to the capacities of taking. perceptual-motor decision and encompassing attentional and executive functions as well as the reaction to difficulty.
- Patent application WO2009137663 A1 is known in the prior art, which deals with testing and / or learning vision and cognition under stress conditions.
- a subject's visual and cognitive abilities can be analyzed and / or trained by providing a visual stimulus to a subject. More particularly, a subject can be assessed and / or trained while under a stressful condition to determine the effect of a stressful condition, such as physical stress or cognitive stress, on visual and sensory abilities. from subject.
- the document WO2003015059 A1 discloses a system and a method which make it possible to diagnose the onset and monitor the course of an intellectual disability.
- the method may include performing one or more psychological tests and teaching a subject the rules for responding to one or more tests without providing cultural cues, such as can be found in language-based learning techniques. . Appropriate test responses can be simulated during a learning phase preceding the testing phase.
- An apparatus, system and method for controlling cognitive function may be implemented in a computerized system.
- a method is implemented by computer for cognitive tests, in particular for conditions linked to dementia.
- the method is administered on a computer workstation in an interactive web-based format and examines the cognitive abilities of the patient.
- the method provides indications for dementia, including Alzheimer's disease and other cognitive disorders.
- the process does not require administration by a trained professional, but rather is administered in a web browser, uses a server and a workstation via the Internet or locally at the workstation.
- US6280198B1 relating to a computer-implemented method for remotely administering and monitoring cognitive tests on a person using a computer network comprising remote computers.
- the computer-implemented method involves administering a set of basic cognitive tests to the person.
- the method further includes repeatedly administering a set of cognitive tests, obtaining a performance response from the person to the tests, and downloading the test information via the computer network.
- a database can be built from the response to the performance of several people.
- the computer-implemented method includes administration using at least two computers, at least one local and the other remote.
- Canadian patent CA 2683728 relates to the visual, cognitive and coordination skills of a subject which can be experienced and / or trained by providing a variety of stimuli to a subject. Responses may be received from a subject, the appropriateness of which may depend on the combination of stimuli provided to the subject.
- a touch screen display device can be used both to provide stimuli and to receive responses from a subject. Any type of output device and input device to receive responses can be used. Behavioral information and other data regarding a subject's performance can be recorded. Scoring can be based on speed, accuracy and other aspects of a subject's performance.
- Document US 2005/0192513 A1 discloses a method of psychological testing of a subject performed by presenting a test with output means such as a computer monitor and input means such as a keyboard, and providing the subject with instructions to play a simulation of the test so that the subject can learn how to perform the test from the simulation.
- the test is therefore independent of the subject's language skills or verbal instructions provided by a supervisor.
- the third task is a conditional reaction time task where the subject will respond to the right or to the left depending on the second symbol appearing next to it, the response is conditioned on the indication given by this second symbol which appears next to the arrow .
- the known methods do not disclose a more reliable index for measuring brain function, since it does not involve a greater mobilization of the patient's attention in response to strictly identical stimuli and with a strictly identical motor response as well. Consequently, there is a bias due to the diversity (unreliability) of the reaction time.
- the state of the art does not include filtering to distinguish, in patient responses, those related to the reaction to difficulty from those related to the cognitive state of attention and executive.
- the prior art mainly uses single or choice reaction time measurements, or separate tests measuring specific functions with the calculation of an "overall" index. Then sets of tests are carried out, it being understood that the majority of the tests are related to the culture.
- the aim of the present invention is to provide a new method for measuring perceptual-motor decision-making capacities (including attention, executive functions, inhibition and reaction to difficulty) which is faster to the handover, more international (not linked to the language or to the subject's culture) and repeated a few days and weeks apart (usable to monitor a follow-up), while being in phase with the latest neuroscience wraps.
- this processing system further comprises means for measuring a reaction time linked to a third level of difficulty comprising a task in which the subject must perform two simultaneous categorizations on the same stimulus.
- the processing system according to the invention can also advantageously implement a library of common stimuli for all of the difficulty levels.
- the database is advantageously designed to store the historical performances of each subject. It can include images of animals in different color gradients, and / or images of objects in different color gradations.
- the means for emitting a sensory stimulus to a subject may include a screen or a headset or a sound emitting device.
- the response detection means may be provided to receive pressure or gaze fixation continuously exerted by the subject and to detect a release of this pressure or of this fixation, said release being interpreted as a response to this stimulus.
- the response detection means provided to permanently receive a pressure or a fixation exerted by the subject and to detect a release of this pressure or fixation can for example comprise a computer mouse, or a gamepad or a touch screen or a device for capturing the direction of the gaze or any accessory capable of capturing the pressure or the direction of the gaze.
- a method for processing responses of a human or animal subject to sensory stimuli comprising a step for emitting these stimuli to a subject, a step for detecting responses of the subject to these stimuli, a step for processing the responses thus detected, said step of emitting stimuli being arranged so as to subject said subject to instructions for responding to these stimuli, of increasing or decreasing complexity according to at least three levels of difficulty, said processing step comprising:
- a step for measuring a reaction time to simple stimuli corresponding to a first level of difficulty and a step for measuring a reaction time to stimuli linked to a choice on a categorization corresponding to a second level of difficulty, in response to an instruction previously taught to the subject.
- the processing step further comprises a step for measuring a reaction time linked to a third level of difficulty comprising a task in which the subject must perform two simultaneous categorizations on the same stimulus.
- the set of stimuli emitted can be provided to distinguish at least two choices, each choice referring to two categories mutually exclusive.
- the processing method according to the invention may further comprise processing the reaction times corresponding to the first, second and third difficulty levels, comprising:
- a mapping of the measurement results corresponding to the subject, on several axes comprising a first axis (S) representative of average executive reaction times and a second axis (D) representative of the subject's reaction to the difficulty of the stimuli.
- average executive reaction time is understood to mean a reaction time linked to the categorization, that is to say not including the perceptual-motor response time.
- the processing method according to the invention may further include a step for putting the execution times of tasks of different difficulties on the same scale, in order to be able to compare them.
- the detection of a response to a stimulus may include a detection of the release of an action initiated beforehand and exerted continuously until the arrival of said stimulus.
- FIG. 1 illustrates a practical example of a group of tests (A, B, C) implemented in the method according to the invention, and the fact that each group of tests is preceded by a learning phase of the task.
- FIG. 2 illustrates a particular mode of response to a stimulus with motor engagement of attention (pressure triggering the test);
- FIG. 3 illustrates the steps associated with part A of a test: measurement of the subject's reaction time;
- Figure 4 shows an example image from the database, without colors and with solid colors
- Figure 5 illustrates the steps associated with Part B of a test: reaction time measurement associated with a choice category;
- Figure 6 illustrates the steps associated with part C of a test: reaction time measurement associated with two choice categories;
- FIG. 7 is an example of a mapping of the data of a set of measurement witnesses collected in the test method according to the invention.
- FIG. 8 represents an example of a correlation table between the data collected
- FIG. 9 illustrates a method of graphing the results of a group of witnesses and the observed axis of symmetry, then the data represented with a rotation of 45 degrees along the axis of symmetry;
- FIG. 10 diagrammatically represents the various measurements taken, of errors and of time, and the mathematical processing which are carried out on the basis of these measurements.
- test method comprising three parts A, B and C of increasing difficulty each including 16 tests and preceded by a task learning.
- the subject is placed in front of a computer screen and responds to stimuli using a mouse connected to that computer.
- the number of images and their complexity are the same under all conditions.
- the subject is asked to identify different targets in each condition.
- mice is an example, another object that can perform the same function such as for example a touch screen, a keyboard, a joystick, a pedal, a stylus, and more generally any object sensing a pressure or immobilization on a target followed by a change, for example a gaze direction sensor.
- the present invention can use the various devices to test a wide range of motor skills such as moving objects (change of location) and / or complex / continuous motor skills such as positioning (by acting on a command. discrete state) or a setting.
- the present invention can also measure travel time, regularity of movements, complex hand-eye coordination, hand-hand coordination, foot-eye coordination.
- the system may include software, as well as a combination of software and hardware, for example: joysticks, pedals, microphones, etc. specially adapted. It can also be configured to operate as a stand-alone module located in the user's home, in a medical center, an establishment, a therapeutic center or any other suitable location. It can further include an interconnected system of one or more workstations.
- the system can include adaptable computer programs accessible to computers / workstations via CD, USB key, Internet, an intranet or any other means for transporting information.
- reaction time measurements are in practice carried out using the internal calculation means of the computer used for carrying out the test, but it is also possible to provide for the use of an external timing device which would be connected to the computer.
- the test method according to the invention comprises, with reference to FIG. 2, elementary interrogation sequences consisting of a press on a device signifying the engagement of the subject's attention, a waiting time, the transmission a stimulus and a response of the subject by maintaining or releasing the support.
- Stimuli can be visual (images) or auditory (sounds) and have properties in common (identical visual load, duration, frequency, volume of identical sound, and others).
- the stimuli respect each of the criteria of the instruction or not (for example gray or white, object or alive, severe or acute).
- the instruction is for the subject to release the pressure if the stimulus meets all the criteria of the instruction, whether it is simple or complex.
- the response is validated or not depending on compliance with the criteria of the instruction by the stimulus. In the event of a good response, as in the event of a bad response, the time between the emission of the stimulus and the response is measured.
- the test is performed by means of a computer and is based on a response of "lifting the finger of the mouse” after verifying the attentional engagement by placing the finger on the mouse.
- the subject's action is measured so as to assess a brain's functioning speed with the motor elements removed from the response.
- Part A of the test according to the invention is dedicated to measuring the subject's simple reaction time.
- a white screen is first displayed for 0.2 seconds, then an invitation to click the mouse is displayed for 2 seconds.
- a white screen is displayed for a random duration between 2 and 7 seconds. If the subject responds during this sequence by releasing their finger, this response will be interpreted as an impulsivity error.
- a test image is viewed for 3 seconds. Non-response to this stimulus is interpreted as an error of omission.
- Figure 4 shows an example of a test image displayed among the 16 images of part A, B or C of the test, with 4 different images for each category. Images are randomly extracted from a database and no image is repeated.
- part B of the test shown in Figure 5, the objective is to measure reaction times and a choice of category (eg, white / gray).
- a selection criterion is randomized. This criterion is for example that the subject releases his click only if the image is gray.
- a reaction time to stimuli linked to a choice on a categorization corresponding to a second level of difficulty is measured, in response to an instruction previously taught to the subject.
- the elementary sequence of this part B inviting you to release the click if the image is white is for example the successive display of a white screen for 0.2 seconds, of an invitation to click on the mouse for a duration of 2 seconds, a random white screen of 2 to 7 seconds, followed by either a gray image or a white image, for 3 seconds.
- Part C of the test according to the invention is dedicated to reaction time measurements and to collecting two choices (white / gray and live / non-alive).
- the criterion for the white / gray choice is the opposite of condition B, while the criterion for the living / non-living or object choice is randomized, for example an invitation to release the click only if the image is both gray and alive.
- the subject is subjected to a third level of difficulty comprising a task in which he must perform two simultaneous categorizations on the same stimulus.
- the test method according to the invention comprises a part intended to aid in understanding the cognitive functioning of a subject by the post-processing of the subject's data with the aim of isolating two components of the possible slowing down in said subject. . It is thus a question of understanding how this subject carries out a decision-making by breaking down his cognition according to a set of underlying indicators of his cognitive functioning.
- the data processing is carried out on standardized response times by removing the response time to the simplest experiment from the other response times, in order to free itself from the parts of perception of the stimulus and of implementation of the response action in response time.
- the first factor S is representative of an overall slowing down of the subject by an average speed linked to the subject's attention to the task reduced to a scale independent of the level of difficulty
- the second factor A of an over or under slowing down when the difficulty increases.
- the analysis includes other factors based on an analysis of the rate and type of errors produced and the variance in response times of each individual. The aim of the test is to observe whether each of these factors statistically deviates from the norms.
- reaction time A it was observed that this time has small fluctuations. It was decided to subtract the time A which is considered as a “motor time base (perception of the item and decision making and execution of the motor response)”, because what interests us is the “cerebral” overtime linked specifically to the difficulty analysis.
- S is the average attentional time, corresponds to the average executive slowdown of a person. On a scale made independent of the level of difficulty of the tasks;
- A is the variation in response time linked to the increase in difficulty of tasks, an index of reaction to difficulty, including reaction to difficulty but also an index of adaptation to difficulty.
- the variables S and D can be calculated as follows:
- the present invention can also be implemented on individual stations or on several workstations connected to a network in retirement homes and communities, or health clubs.
- the present invention can also include a database that can store the responses and possibly the historical performance of each user.
- the database can be local or remote and can be accessible via the Internet or be fully or partially available at the user's facilities.
- the database can be managed by an organization and can accumulate histories and responses from many individuals, thereby enabling the eventual creation of a global standards database.
- the database can be used to compare stored responses with current user's responses to facilitate cross-validation of user's test results against standards.
- This tool for determining cognitive functioning will therefore constitute an element of aid in the evaluation of behavioral disorders such as hyperactivity and attention deficit disorder (in particular, but not exclusively, with all the tests treating attention skills), or learning disabilities such as dyslexia, dysgraphia or dyscalculia (primarily, but not exclusively, with fluency and naming tests).
- the uses of the database are not limited to these applications, and are included in the principle of the present invention other applications thereof. It should be noted that the present invention can be operable from a mobile storage device, such as a CD or a USB key, or can be accessible from a central computer or via public communication networks, such as the internet. Additionally, the present invention can be practiced by a single person or an organization, and the database can be centralized, located and / or owned by an internal or external organization.
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- Biomedical Technology (AREA)
- Medical Informatics (AREA)
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- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Psychiatry (AREA)
- Psychology (AREA)
- Child & Adolescent Psychology (AREA)
- Developmental Disabilities (AREA)
- Hospice & Palliative Care (AREA)
- Educational Technology (AREA)
- Social Psychology (AREA)
- Neurology (AREA)
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- Epidemiology (AREA)
- Data Mining & Analysis (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1908081A FR3098703B1 (fr) | 2019-07-17 | 2019-07-17 | Procédé et système de test de la cognition par traitement de la réaction d’un sujet à des stimuli |
| PCT/FR2020/051299 WO2021009470A1 (fr) | 2019-07-17 | 2020-07-17 | Procédé et système de test de la cognition par traitement de la réaction d'un sujet a des stimuli |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3998945A1 true EP3998945A1 (fr) | 2022-05-25 |
Family
ID=69630339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20753995.8A Pending EP3998945A1 (fr) | 2019-07-17 | 2020-07-17 | Procédé et système de test de la cognition par traitement de la réaction d'un sujet a des stimuli |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US20220167895A1 (fr) |
| EP (1) | EP3998945A1 (fr) |
| CN (1) | CN114746017B (fr) |
| AU (1) | AU2020312779A1 (fr) |
| CA (1) | CA3147510A1 (fr) |
| FR (1) | FR3098703B1 (fr) |
| WO (1) | WO2021009470A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115171658A (zh) * | 2022-06-13 | 2022-10-11 | 深圳先进技术研究院 | 训练方法、训练装置、训练设备及存储介质 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6280198B1 (en) | 1999-01-29 | 2001-08-28 | Scientific Learning Corporation | Remote computer implemented methods for cognitive testing |
| US6632174B1 (en) | 2000-07-06 | 2003-10-14 | Cognifit Ltd (Naiot) | Method and apparatus for testing and training cognitive ability |
| AU7560401A (en) * | 2000-07-27 | 2002-02-13 | Examination Services For Psych | Psychological testing method and apparatus |
| US20020192624A1 (en) | 2001-05-11 | 2002-12-19 | Darby David G. | System and method of testing cognitive function |
| US6669481B2 (en) * | 2001-11-08 | 2003-12-30 | The United States Of America As Represented By The Secretary Of The Army | Neurocognitive assessment apparatus and method |
| CA2683728C (fr) | 2007-04-13 | 2016-03-29 | Nike International Ltd. | Essai et entrainement de la vision, de la cognition et de la coordination |
| US9564058B2 (en) | 2008-05-08 | 2017-02-07 | Nike, Inc. | Vision and cognition testing and/or training under stress conditions |
| US20090287064A1 (en) | 2008-05-15 | 2009-11-19 | Medical Interactive Education, Llc | Computer implemented cognitive self test |
| US9558499B2 (en) * | 2009-02-27 | 2017-01-31 | The Forbes Consulting Group, Llc | Methods and systems for assessing psychological characteristics |
| WO2013120075A1 (fr) * | 2012-02-09 | 2013-08-15 | Anthrotronix, Inc. | Outil d'évaluation des performances |
| US10449359B2 (en) * | 2015-01-24 | 2019-10-22 | The Trustees Of The University Of Pennsylvania | Method and apparatus for improving cognitive performance |
| US20190008441A1 (en) * | 2017-07-10 | 2019-01-10 | VirtualMind, LLC | Diagnosing brain injury using a virtual reality system |
-
2019
- 2019-07-17 FR FR1908081A patent/FR3098703B1/fr active Active
-
2020
- 2020-07-17 CN CN202080063970.XA patent/CN114746017B/zh active Active
- 2020-07-17 EP EP20753995.8A patent/EP3998945A1/fr active Pending
- 2020-07-17 US US17/597,676 patent/US20220167895A1/en not_active Abandoned
- 2020-07-17 WO PCT/FR2020/051299 patent/WO2021009470A1/fr not_active Ceased
- 2020-07-17 CA CA3147510A patent/CA3147510A1/fr active Pending
- 2020-07-17 AU AU2020312779A patent/AU2020312779A1/en not_active Abandoned
-
2024
- 2024-10-04 US US18/906,825 patent/US20250025082A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021009470A1 (fr) | 2021-01-21 |
| CN114746017A (zh) | 2022-07-12 |
| US20250025082A1 (en) | 2025-01-23 |
| AU2020312779A1 (en) | 2022-02-24 |
| FR3098703B1 (fr) | 2024-11-29 |
| FR3098703A1 (fr) | 2021-01-22 |
| CN114746017B (zh) | 2025-07-22 |
| CA3147510A1 (fr) | 2021-01-21 |
| US20220167895A1 (en) | 2022-06-02 |
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| 17Q | First examination report despatched |
Effective date: 20260211 |