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The BIS/BAS Scales Behavioral Inhibition System/Behavioral Activation System (BIS/BAS)[1] were developed based on the Gray's biopsychological theory of personality which suggests that there are two general motivational systems that underlie behavior and affect: BIS and BAS. This 20-item self-report questionnaire is designed to assess dispositional BIS and BAS sensitivities.

See alsoEdit


  1. (1994). Behavioral inhibition, behavioral activation, and affective responses to impending reward and punishment: The BIS/BAS Scales. Journal of Personality and Social Psychology 67 (2): 319.
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