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The “BIS/BAS” Scales (Carver & White, 1994) and the Sensitivity to Punishment and Sensitivity to Reward Questionnaire (SPSRQ; Torrubia, Avila, Molto, & Caseras, 2001) are two self-report instruments used for the assessment of Gray’s concepts of impulsivity and anxiety. In this paper, we examined both instruments in terms of their factorial structure and their construct validity using data...