Test and Quantitative Analysis of EEG Information Response in the Cognitive Process of the Graphical Perception in Engineering Graphics

Cognition of the drawing sense is a key channel for effective conversion between planar element and three-dimensional form in brain cognitive thinking. In order to solve the problems of unclear cognitive process of image perception, discontinuous spatial thinking and lack of cognitive analysis methods in engineering graphics courses, a test experiment of Cognition of the drawing sense was designed according to the brain potential correlation theory of cognitive events. The EEG data of samples of students in different classes were tested to analyze the waveform changes of P300 potential. The results showed that P300 potential changes could be induced by the stimulation of the teaching content of graphical perception, and the related parts of graphical perception cognition were mainly in the left frontal lobe of the brain. The P300 potential value can be used to reflect students’ cognitive degree of graphical perception. The stronger students’ ability to accept the teaching content, the lower the peak value of P300 potential generated by stimulation. The P300 potential changes of different samples were compared, so as to quantitatively analyze the cognitive ability of picture sense, so as to improve the input efficiency of picture sense teaching content to students, which is expected to form a comprehensive evaluation method with the evaluation of course work and test scores, and also provide a basis for the feedback optimization of course content.