Comparison of brain behavioral activation/inhibition systems and locus of control among girls and boys university student

The aim of this study was comparison of brain behavioral activation/inhibition systems and locus of control in girls and boys university student. of this study was cause and effect, statistical society were all of Ahwaz Payamenour University students (15 thousand people). Sample contains of 300 participants (75 boys & 75 girls with external locus of control and 75 boys & 75 girls with internal locus of control) were selected stratified random sampling. Research instruments were Gray Wilson personality questionnaire (2000) and Rutter locus of control scale (1966). Showed that the brain behavioral activation/inhibition systems of four groups were significantly different. Activity of BAS in external locus of control was the most and in boys was higher than girls. Activity of BIS in internal locus of control was the most and in girls was higher than boys. Activity of FFS in external locus of control have shown highest mean, and boys were higher in Fight but girls were higher in flight. On Gray`s theory, there are relationship between behavioral activation system and positive affect and behavioral inhibition system and negative affect which active by effect of internal and external stimulus. Differences of this systems available ways to impress the cause and prevent of brain activities on different kind of psychopathologies.