The BIS/BAS scales (Carver and White 1994) are presented as a self-report questionnaire, which measures the behavioral approach system (BAS), and the behavioral inhibition system (BIS). BAS measures sensitivity to reward, and BIS measures sensitivity to punishment. The BIS/BAS scales consist of 24 items which can be divided into four subscales: BAS–fun seeking, BAS–reward responsiveness, BAS–drive, and BIS. Also, BAS–total score can be computed. Items are scored on a four-point scale with the following labels: completely agree, agree, disagree, and completely disagree. The psychometric properties for the Dutch version of the BIS/BAS scales are satisfactory (Franken et al. 2005).
