Emotion effects on memory from childhood through adulthood: Consistent enhancement and adult gender differences

Emotion typically enhances memory. This "canonical" emotional memory enhancement (EME) effect has been extensively studied in adults, but its developmental trajectory is unclear. The handful of developmental studies that have manipulated emotion at encoding and then tested subsequent memory have yielded mixed results. To identify whether development change in EME occurs across middle childhood, adolescence, and early adulthood, we examined EME in 206 8- to 30-year-olds, using the same stimuli, paradigm, and analyses for all participants. At encoding, participants saw negative, neutral, and positive pictures while completing an incidental task. Two weeks later, participants completed a recognition memory test. We calculated negative-neutral and positive-neutral memory difference scores for each participant and then tested whether EME was predicted by age or gender. Negative pictures were remembered better than neutral pictures; the magnitude of this difference diminished in older male participants but not in older female ones. Positive pictures were also remembered better than neutral pictures, but this EME effect was small and did not change significantly with age or by gender. We also examined whether subjective ratings of stimulus emotion changed with age or between genders, and we report small differences. These results suggest that emotion effects on recognition memory are apparent by middle childhood and remain consistent across adolescence and early adulthood for girls and women, whereas emotion elicitation and EME effects diminish slightly with age for boys and men. These findings enrich both the EME literature specifically and what is known about emotion-cognition interactions across middle childhood, adolescence, and early adulthood more generally.