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The psychometric characteristics of Carver and White's (1994) BIS/BAS scales were examined in 2 groups of Dutch adolescents (497 early adolescents and 237 middle adolescents, M _Age = 13.0 years and 16.4 years, respectively) and their middle-aged mothers (M _Age = 45.2 years; N = 734). Confirmatory factor analyses revealed an acceptably fitting 2-factor model for adapted BIS /BAS scales in all 3 groups, reflecting separate BIS and BAS factors. Reliabilities of the 2 scales were satisfactory. The results supported the convergent validity of BIS and BAS scales. BIS was positively correlated with internalizing problem behaviors and neuroticism. BAS was positively correlated with externalizing problem behaviors and extraversion. The discriminant validity of the BIS/BAS scales received mixed support in our data. BIS was negatively correlated with extraversion, and BAS was not correlated with depression. However, BIS was also found to be correlated with externalizing problem behaviors, and BAS was positively correlated with neuroticism. In sum, the scales are suitable for use in research settings, but caution is advocated in application for clinical practice.