Previous studies found that the ADRA2B gene modulates early perception and attention. Here, we aimed to examine whether ADRA2B polymorphisms also influence emotional working memory and the willingness to implement behaviors (switching affective intonation) in order to avoid negative information, both considered indexes of cognitive-affective flexibility. We examined genotype data collected from 212 healthy females, 91 ADRA2B carriers and 121 non-carriers, and found that carriers showed a positivity bias in working memory. That is, carriers remembered a higher number of positive words compared to negative and neutral words. In addition, although carriers were more unwilling to switch intonation in order to avoid negative information, they showed better recognition memory for words read with a positive intonation. These findings suggest that deletion variants of ADRA2B may show greater levels of cognitive-affective flexibility compared to non-carriers.
Keywords: ADRA2B; Emotion; Willingness to avoid negative information; Working memory.
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