This study aims to investigate cognitive response styles to positive affect. A Swedish version of the Responses to Positive Affect questionnaire (RPA) was psychometrically evaluated and experimentally tested as participants were mood induced. The 3-factor model for the RPA questionnaire (Self-focused positive rumination, Emotion-focused positive rumination and Dampening) was replicated, and the RPA was further explored through analyses of convergent and incremental validity. The experimental results revealed that the two positive rumination subscales had a strong relationship with each other and current positive affect. However, none of the RPA subscales functioned as moderators in the relationship between cognitive response style and participants’ mood reactivity.