فصلنامه روانشناسی شناختی

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The purpose of study was to determine the brain waves of subjects with impulsivity trait in performing cognitive task. 140 female students who completed the Revised Eysenck Personality Questionnaire, after control of the inclusion criteria, two groups of 20 people, including high impulsive (Imp+) and low impulsive (Imp-) were selected. The subjects in two  status: (a) resting (without doing the task); and (b) performing a cognitive task (Wisconsin test), taking EEG. The Results showed, when  performing a cognitive task, activity of the prefrontal, frontal, and temporal areas of both hemispheres increased significantly in Imp+. Alpha and Theta wave showed that during cognitive task, the activity of all regions of both hemispheres in Imp+ was greater than Imp-. About Beta wave, the results indicated that the left prefrontal, temporal and the right frontal was more activated  in Imp+ than the other group. The results emphasize to consider personality traits when examining the brain regional activity, as well as  investigate of the functional impulsivity and its differentiation with dysfunctional impulsivity .

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The present study was aimed at analyzing cognitive activity of the brain during creative design thinking. This study was a causal-comparative study. The statistical population of the study was all students of Tabriz University in the period of 2016-17. At first, interested students were invited to participate in the research, and 30 of them were randomly selected and selected from delta, theta, alpha and beta frequency bands in the forehead, central, temporal, temporal and postural areas The series of quantitative electroencephalographic records was quantitatively recorded at two stages of rest and performed by the design of Torrance's cognitive creativity. Then, two cognitive and recreational activities were analyzed by multivariate analysis of variance and all stages were calculated by SPSS software version 19. The findings of the study showed that in the frontal area and at the time of creative cognitive thinking, the alpha is higher, and in the temporal region the Delta level is higher and this difference is significant at P <.1. However, no significant changes were observed in other frequency bands in other areas. Based on the findings of this study, it can be said that understanding the basic functions of the human brain in examining its behavior is very necessary and these results can provide a perspective for studying brain wave patterns as well as creative thinking.