CN1745701A - High-facticity professional testing method and device - Google Patents
High-facticity professional testing method and device Download PDFInfo
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- CN1745701A CN1745701A CNA2005100280304A CN200510028030A CN1745701A CN 1745701 A CN1745701 A CN 1745701A CN A2005100280304 A CNA2005100280304 A CN A2005100280304A CN 200510028030 A CN200510028030 A CN 200510028030A CN 1745701 A CN1745701 A CN 1745701A
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Abstract
A computer aided high-actuality occupation tester with high correctness is composed of computer host, multimedia I/O device, display, multi-channel cerebroelectric wave acquiring unit, amplifier, conditioning unit, A/D converter, output interface, ERP extracting and analyzing module, and synchronous inquiry generating module. Its method includes such steps as editing the inquiring order by use of image, text and speech, randomly providing the inquiry to the person to be tested, synchronously acquiring its cerebroelectric waves, analyzing the answer of the person and judging its correctness.
Description
Technical field
The present invention relates to a kind of electronic test equipment, relate in particular to a kind of computer assisted professional test set, a kind of professional test set that improves test validity and accuracy of saying so more specifically.This device is made up of main frame and multimedia input and output device, display, the collection of multichannel brain electric wave, amplification, conditioning, A/D conversion, output interface circuit, ERP extraction and analysis module, the module of inquiry generation synchronously etc., inquiry orders such as the image of employing pre-edit, literal, sound, present to the testee at random, and the real-time synchronously eeg signal of gathering its head, event related potential is analyzed, mental status when the measured is inquired is analyzed, and judges the really degree of its answer.This method and apparatus can be widely used in polytype talent and professional field tests.
Technical background
The occupation test is the most important instrument of modern industrial and commercial administration and human resource management, talent education and personal growth.In the U.S., be used for about 20,000,000,000 dollars of the talent and professional expense of testing every year at present, use the talent and professional the test in employee's recruitment of all kinds of large and medium-sized enterprises about 80% and the management thereof.At present domestic this field lags far behind the U.S., the very big market demand is arranged and expands space.This product can be widely used in personnel recruitment, occupation recruitment, Talent Management, talent training, vocational training, personal growth, individual's continuing education, fields such as adult education.
At present psychology and professional testing equipment are the testing equipments that is installed in the area of computer aided form that computer constitutes by testing software, though improved the efficient of test by means such as automatic score, time control, validity analysis, but, be in multiple reason, when application the said equipment carries out psychological test and occupation test, some measured is strictly according to the facts answer test question not, makes the validity of test be subjected to a lot of queries, obviously has influence on the verity and the accuracy of test.Yet when the measured answered test question with false state, some can take place and change in its physical signs, the ultimate principle of Here it is a lie detector.So, carrying out psychology and occupation test simultaneously, agree under the basis obtaining the measured, synchronous monitoring measured's individual event or multinomial physical signs, may for analyze, the validity of assessment test provide the foundation of usefulness, thereby improve the accuracy of test.
P300 ripple (ERP current potential) is a main endogenous component relevant with psychological factor, also claims the meaning ripple and understands ripple.Through years of researches, people deepen continuously to the understanding of P300, it is research people's cognitive activities and the useful indicators of judging people's cognitive competence that P300 is now generally acknowledged, the scholar of the U.S. finds, the all reflections to some extent on P300 of stimulus object and subjects's stake and subjects's emotion, and these variations of P300 are that the subjects is uncontrollable.P300 has become the main component of carrying out psychological test with brain wave, and this is the once breakthrough of contemporary psychological test research.
Except analyzing the frequency that compares brain wave or ERP, the brain wave width is also usually analyzed.After the incident of bringing out, in case roomy brain wave occurs, its width surpasses 300ms or more for a long time, on behalf of the measured, this roomy type brain wave just have the cognitive psychological course of processing.
Support that on evidence the P300 waveform is brought out is that renewal, change or working memory just can occur when needing.
A large amount of P300 waveforms seldom can appear in the incident of non-expectation, when they are relevant with goal task.Such incident may guide rebuilds or the renewal working memory.
The process of this renewal representative " activity ", or owing to " labelling " of some incident, these incidents are assumed to be looks back some thing.Thereby the credibility of testing with P300 waveforms detection measured occupation is reliably and accurately.
The object of the present invention is to provide a kind of high-facticity professional test set, with inquiry sequences such as the picture that edits in advance, literal, sound, present to the subjects at random, and the EEG signals of gathering its head simultaneously in real time, then the brain wave potential change is carried out Algorithm Analysis, thereby the subjects is passed judgment on the mental status in various whens inquiry.
Summary of the invention
For realizing purpose of the present invention, the present invention solves the technical scheme that its technical problem adopts, it is characterized in that, this device is by main frame and multimedia input and output device thereof, display, the multichannel brain electric wave is gathered, amplify, conditioning, the A/D conversion, output interface circuit, ERP extracts and analysis module, compositions such as module take place in inquiry synchronously, adopt the image of pre-edit, literal, inquiries such as sound order, present to the testee at random, and the real-time synchronously eeg signal of gathering its head, event related potential is analyzed, mental status when the measured is inquired is analyzed, and judges the really degree of its answer.This method and apparatus can be widely used in polytype talent and professional field tests.
Technical characterictic of the present invention is, apparatus of the present invention partly are made up of brain electrode, signals collecting and change-over circuit, computer, earphone and projector etc., its brain electrode that is placed on the scalp is connected with change-over circuit with eeg signal acquisition by shielding line, links to each other with computer again; Projector links to each other with computer output with earphone.Its eeg signal acquisition and change-over circuit are linked in sequence by preamplifier, wave trap, high pass amplifilter, low pass amplifilter and A/D converter and form; Eeg signal acquisition is connected the brain electrode that is placed on the scalp with the input of change-over circuit, and the outfan of A/D converter links to each other with computer by usb bus.Its computer comprises data communication module, ERP extraction and analytical system, expert judging system and stimulates generation systems (STIM); Wherein, input termination data communication module, the data communication module extracts with ERP and analytical system is electrically connected, and ERP extracts and analytical system is electrically connected with expert judging system and stimulation generation systems respectively, the expert judging system is connected with display, stimulates generation systems to be connected with outfan.The extraction algorithm of ERP current potential adopts β-spline wavelets conversion and independent component analysis in its EEG signals.The inquiry problem that presents on its projecting apparatus screen or the terminal display, by operator's pre-edit good after, be stored in hard disc of computer.
Technical characterictic of the present invention is that when adopting the inventive method and device to test, the tester by monitor and keyboard layout multimedia inquiry file, is used to monitor experimenter's responsing reaction on the backstage simultaneously; The experimenter is subjected to multimedia inquiry before screen, do with button click that button is replied and do oral replying before mike; In above-mentioned answering, extract experimenter's electroencephalogram data by the subject's head electrode simultaneously; The bioelectrical signals that the E.E.G electrode extracts amplifies by amplifier, and the input computer carries out analytical judgment.
The technology of the present invention is characterized in that answer button, reply mike directly links to each other with main frame, the E.E.G electrode links to each other with main frame through preamplifier again, tried screen and link to each other with main frame output with stereo set, preamplifier comprises amplifier and the A/D converter that is linked in sequence; Amplifier comprises that input connects experimenter's E.E.G electrode, the outfan of A/D converter links to each other with main frame, answer button is exactly the keyboard function key that extends, and links to each other with main frame, and the plate that mike connects main frame carries or inserts on the sound card of notch.
Technical characterictic of the present invention is that it is that the stream electrode is provided with method that the E.E.G electrode of apparatus of the present invention method of laying is called for short 10/20, also claims Jasper method.Earlier the d branch from the nasion to pillow back tuberosity subtracts 10 five equilibriums head, and behind the nasion, porus acusticus externus, pillow the loop wire of tuberosity by making starting point and be divided into 12 five equilibriums with the intersection point of d; Being the center of circle with center, top on the head again, is that radius is drawn concentric circular with 1/4 d length.3 pairs of lines of this concentric circular and d and loop wire left-right symmetric point intersect, and draw 10 intersection points.8 intersection points, 12 loop wire Along ents, vertex and left and right sides ears altogether 23 electrode potentials.Electroencephalogram is formed in the variation of these 23 electrode potentials.
Technical characterictic of the present invention is that the inventive method and device are applied in the professional test process, preside over the inquiry exercise question that test person can adopt the relevant occupation test of multimedia mode layout.These exercise questions can be selected from existing format occupation test exam pool, or according to testee ownness specialized designs.The mode of inquiry can be to show in the pictograph mode, perhaps plays the format inquiry topic of recording in advance.The multimedia inquiry system is connected by the serial port mode with computer collection, recording system, and the former presents with the millisecond precision, and audiovisual stimulates and the record measured reacts simultaneously, sends corresponding event through serial communication interface.The brain wave acquisition module is gathered brain wave and is received the stimulation and the behavior incident of inquiring subsystem from multimedia via serial communication interface simultaneously.Multimedia inquiry subsystem adopts form to come layout and stores coding and the corresponding parameter that stimulates with behavior.
Technical characterictic of the present invention is, multimedia irritant reaction subsystem is taken into account versatility and motility, adopt form to come layout and coding and the corresponding parameter of storage stimulation with behavior reaction, the user does not need programming skill, but the layout of audio-visual stimulus material, design society realize all kinds of experimental paradigm, can the Millisecond precision present picture and behavioral indicators such as sound and recording reacting time, sending to brain electricity/cognitive level recording subsystem by serial communication interface simultaneously stimulates and the behavior reaction event code.In the stipulated time section after a target stimulus, roomy P300 ripple occurs, just one " untrue state " appears in representative, explains and analyze this E.E.G with computer program.The width of P300 ripple appears to stimulate in the 400-800 millisecond of back.In data acquisition module synchronous recording and storage the brain wave and stimulation incident and reaction incident from multimedia inquiry reaction subsystem from eeg amplifier.
Technical characterictic of the present invention is, analyze event related potential (ERP) and P300 ripple in apparatus of the present invention, be to play in back 1000 milliseconds at each inquiry exercise question, choose the inquiry exercise question preceding 200 milliseconds and play exercise question after 800 milliseconds brain wave, seek width greater than 300 milliseconds roomy brain wave waveform (see figure 5).The feature of P300 ripple is to appear at incident to stimulate in back 1000 milliseconds, and the brain wave width is greater than 300 milliseconds.Can adopt wavelet transformation and independent component analysis method that ERP current potential and P300 ripple are extracted and analyze, also can adopt universal physiological signal collection and analysis software or ERP current potential and P300 ripple are manually extracted and analyze by the brain wave analysis software.
The invention has the beneficial effects as follows the validity and the accuracy that significantly improve occupation test and talent's test, reduce the wasting of resources of employing mechanism.
Description of drawings
Fig. 1 is apparatus of the present invention schematic diagrams
Fig. 2 is apparatus of the present invention flow charts
Fig. 3 is eeg signal acquisition and conditioning block diagram
Fig. 4 is the brain electrode position view
Fig. 5 is a P300 ripple sketch map
The specific embodiment
The present invention is further described below in conjunction with embodiment
Embodiment 1.
Principle of the invention figure as shown in Figure 1.A kind of professional test set of partly forming by display or screen, earphone or speaker, brain electrode, collection and conditioning module, computer etc., the brain electrode that it is characterized in that being placed on the scalp links to each other with change-over circuit with brain wave acquisition by shielding line, collection links to each other with the computer input with change-over circuit again, and projector links to each other with computer output with earphone.
Described eeg signal acquisition and change-over circuit as shown in Figure 3, are linked in sequence by preamplifier, wave trap, high pass amplifilter, low pass amplifilter and A/D converter and form; Eeg signal acquisition is connected the brain electrode that is placed on the scalp with the input of change-over circuit, and the outfan of A/D converter links to each other with computer by usb bus.The outfan of operational amplifier 2 is connected with the input of high pass amplifilter, the outfan of high pass amplifilter is connected to the input of low pass amplifilter, the outfan of low pass amplifilter is connected with A/D converter again, is connected to main frame at last.
Eeg signal acquisition and change-over circuit performance indications
● short circuit input noise: less than 0.7 μ V peak-to-peak value;
● band system band: 0.5-40Hz;
● the 50Hz trap: decay is not less than 60dB;
● input impedance: can realize greater than 10
10Ω;
● amplification: can realize more than 50,000 times, adjustable;
● common mode rejection ratio: be not less than 110dB;
● sample frequency: every helical pitch is 256Hz;
● the electrode mode of leading: unipolar lead, bipolar lead is optional;
● each interchannel isolation: be not less than 100dB;
Wherein the method for testing of interchannel isolation is: two input short circuits of (1) each passage preamplifier are write down the peak-to-peak value A of each passage short circuit output noise altogether
i(i=1 ..., n); (2) keep the short circuit of i passage input altogether, other passage makes its output be in full width of cloth duty, and writes down its peak-to-peak value P by regulating input signal, writes down the peak-to-peak value A ' of i passage output signal simultaneously
i(3) bring formula then into: the interchannel isolation=(20*log (A '
i-A
i/ p)) dB
(4) with quadrat method other each passage is tested.
Catching of ERP current potential (P300) got present state-of-the-art signal processing method-wavelet transformation of employing and independent component analysis method in apparatus of the present invention.
Apparatus of the present invention work process is as shown in Figure 4: at first, place recording electrode in P2, Cz and Fz point by international standard 10-20 system, the earth polar places forehead central authorities, and reference electrode is sandwiched in ear-lobe, as shown in Figure 4.Before placing, electrode, make skin resistance less than 5K Ω with ethanol and ether mixed liquor defat decontamination.For the ease of data management, need set up subjects's personal files, comprising subjects's name, age, contact method, health status etc. to tested personnel.Enter the layout of inquiry sequence and the setting of inquiry generation systems then.In order inquiry sequence is carried out layout, and determine the inquiry number of times.After peripheral hardware equipment connects, just can carry out brain wave psychological test and data acquisition.Carry out collection of illustrative plates playback and Algorithm Analysis at last, comprise figure spectral editing, storage, brain electricity analytical and the feature extraction of ERP current potential, analysis expert judge etc., wherein wavelet transformation and independent component analysis method are adopted in the extraction of ERP current potential.
The subjects is being subjected to inquiry (picture, literal etc.), and brain is inevitable movable, i.e. endogenous ERP potential change, and this current potential is relevant with people's the cognitive psychological course of processing, and the physical parameter that stimulates with incident has nothing to do.It is that the subjects is uncontrollable that this E.E.G changes.The subjects thinks control more, and his E.E.G is undesired more, because the idea itself of his this " thinking control " will produce distinguished E.E.G.Therefore, occupation test credibility is greatly improved.
Claims (4)
1. the present invention relates to a kind of professional test set that improves test validity and accuracy, it is characterized in that, this device is by main frame and multimedia input and output device thereof, display, the multichannel brain electric wave is gathered, amplify, conditioning, the A/D conversion, output interface circuit, ERP extracts and analysis module, compositions such as module take place in inquiry synchronously, adopt the image of pre-edit, literal, inquiries such as sound order, present to the testee at random, and the real-time synchronously eeg signal of gathering its head, event related potential is analyzed, mental status when the measured is inquired is analyzed, judge the really degree of its answer, this method and apparatus can be widely used in polytype talent and professional field tests.
2. according to the described device of claim 1, technical characterictic of the present invention is, device of the present invention partly is made up of brain electrode, signals collecting and change-over circuit, computer, earphone and projector etc., its brain electrode that is placed on the scalp is connected with change-over circuit with eeg signal acquisition by shielding line, links to each other with computer again; Projector links to each other with computer output with earphone, and its eeg signal acquisition and change-over circuit are linked in sequence by preamplifier, wave trap, high pass amplifilter, low pass amplifilter and A/D converter and form; Eeg signal acquisition is connected the brain electrode that is placed on the scalp with the input of change-over circuit, the outfan of A/D converter links to each other with computer by usb bus, and its computer comprises data communication module, ERP extraction and analytical system, expert judging system and stimulates generation systems (STIM); Wherein, input termination data communication module, the data communication module extracts with ERP and analytical system is electrically connected, ERP extracts and analytical system is electrically connected with expert judging system and stimulation generation systems respectively, the expert judging system is connected with display, stimulate generation systems to be connected with outfan, the extraction algorithm of ERP current potential adopts β-spline wavelets conversion and independent component analysis in its EEG signals, the inquiry problem that presents on its projecting apparatus screen or the terminal display, by operator's pre-edit good after, be stored in hard disc of computer.
3. according to the described device of claim 1, technical characterictic of the present invention is, the inventive method and device are applied in the professional test process, preside over the inquiry exercise question that test person can adopt the relevant occupation test of multimedia mode layout, these exercise questions can be selected from existing format occupation test exam pool, or according to testee ownness specialized designs, the mode of inquiry, can be to show in the pictograph mode, perhaps play the format inquiry topic of recording in advance, multimedia inquiry system and computer collection, recording system is connected by the serial port mode, the former presents with the millisecond precision, and audiovisual stimulates and the record measured reacts simultaneously, send corresponding event through serial communication interface, the brain wave acquisition module is gathered brain wave simultaneously via stimulation and the behavior incident of serial communication interface reception from multimedia inquiry subsystem, and multimedia inquiry subsystem adopts form to come layout and stores coding and the corresponding parameter that stimulates with behavior.
4. according to the described device of claim 1, technical characterictic of the present invention is, multimedia irritant reaction subsystem is taken into account versatility and motility, adopt form to come layout and coding and the corresponding parameter of storage stimulation with behavior reaction, the user does not need programming skill, but audio-visual stimulus material layout, design society realizes all kinds of experimental paradigm, can the Millisecond precision present picture and behavioral indicators such as sound and recording reacting time, sending to brain electricity/cognitive level recording subsystem by serial communication interface simultaneously stimulates and the behavior reaction event code, in the stipulated time section after a target stimulus, roomy P300 ripple appears, just one " untrue state " appears in representative, explain and analyze this E.E.G with computer program, the width of P300 ripple appears to stimulate in the 400-800 millisecond of back, in data acquisition module synchronous recording and the storage brain wave and stimulation incident and reaction incident from multimedia inquiry reaction subsystem from eeg amplifier.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961151A (en) * | 2012-11-27 | 2013-03-13 | 清华大学 | Psychological assessment system |
| TWI392471B (en) * | 2009-12-08 | 2013-04-11 | The use of brain waves in the intelligence, sexual orientation and emotional measurement system | |
| CN104856704A (en) * | 2015-03-31 | 2015-08-26 | 鲍崇智 | Method and system for objective-subjective combined psychological assessment |
| CN106529906A (en) * | 2016-11-03 | 2017-03-22 | 上海海事大学 | Job recruitment system and method using brain information |
| CN107026910A (en) * | 2017-05-08 | 2017-08-08 | 清远市志远软件技术服务有限公司 | A kind of information system management inquiry system |
| CN108171437A (en) * | 2018-01-15 | 2018-06-15 | 吉林工程技术师范学院 | A kind of psychology vocational ability evaluation system |
| CN109350082A (en) * | 2018-09-05 | 2019-02-19 | 李锁让 | Assessment instrument and assessment method are selected in occupation based on tranquillization state EEG signals |
| CN113598794A (en) * | 2021-08-12 | 2021-11-05 | 中南民族大学 | Training method and system for detection model of ice drug addict |
-
2005
- 2005-07-21 CN CNA2005100280304A patent/CN1745701A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI392471B (en) * | 2009-12-08 | 2013-04-11 | The use of brain waves in the intelligence, sexual orientation and emotional measurement system | |
| CN102961151A (en) * | 2012-11-27 | 2013-03-13 | 清华大学 | Psychological assessment system |
| CN104856704A (en) * | 2015-03-31 | 2015-08-26 | 鲍崇智 | Method and system for objective-subjective combined psychological assessment |
| CN106529906A (en) * | 2016-11-03 | 2017-03-22 | 上海海事大学 | Job recruitment system and method using brain information |
| CN107026910A (en) * | 2017-05-08 | 2017-08-08 | 清远市志远软件技术服务有限公司 | A kind of information system management inquiry system |
| CN108171437A (en) * | 2018-01-15 | 2018-06-15 | 吉林工程技术师范学院 | A kind of psychology vocational ability evaluation system |
| CN108171437B (en) * | 2018-01-15 | 2021-08-31 | 吉林工程技术师范学院 | Psychological occupational ability evaluation system |
| CN109350082A (en) * | 2018-09-05 | 2019-02-19 | 李锁让 | Assessment instrument and assessment method are selected in occupation based on tranquillization state EEG signals |
| CN113598794A (en) * | 2021-08-12 | 2021-11-05 | 中南民族大学 | Training method and system for detection model of ice drug addict |
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