Age differences were examined in affective processing, in the context of a visual search task. Young and older adults were faster to detect high arousal images compared with low arousal and neutral items. Younger adults were faster to detect positive high arousal targets compared with other categories. In contrast, older adults exhibited an overall detection advantage for emotional images compared with neutral images. Together, these findings suggest that older adults do not display valence-based effects on affective processing at relatively automatic stages.

Research has suggested that aging results in a "positivity effect," with young adults dwelling on negative information, and older adults attending to positive information. In order to understand age-related changes in r emotional processing underlying this effect, the present fMRI study compared neural activity in young and older adults as they viewed positive, negative, and neutral images. Results indicated a striking age-related reversal in the valence of information eliciting activity within the ventromedial prefrontal cortex (VMPFC). Negative in comparison with positive images activated the VMPFC more for young adults, whereas positive in comparison with negative images activated the VMPFC more for the older adults. The VMPFC is a region associated with the p processing of emotional information, and more specifically, with emotion generation and emotion regulation. Therefore, the present results suggest that age-related changes in these processes implemented by the VMPFC p y contribute to older adults' "positivity effect."

Age differences in social-cognitive functioning were assessed by examining sensitivity to the trait implications of behavioral cues when making social inferences. Adults (age range = 23-86 years) read target descriptions containing positive and negative behaviors relating to either morality or competence. Consistent with past research, middle-aged and older adults were more likely than younger adults to make inferences consistent with the trait-diagnostic implications of the behaviors. Age was also associated with increased sensitivity to additional cues that moderated the diagnostic value of behaviors based on simple descriptive content. The authors argue that these age differences reflect a type of expertise based in accumulated social experience, a conclusion bolstered by an additional finding that social activity moderated age differences in social judgments.

Introduction-Older adults often show sustained attention toward positive information and an improved memory for positive events. Little is known about the neural changes that may underlie these effects, although recent research has suggested that older adults may show differential recruitment of prefrontal regions during the successful encoding of emotional information. In the present study, effective connectivity analyses examined the network of regions that college-age and older adults recruited during the encoding of positive and negative images.Methods-Participants viewed positive and negative images while undergoing a functional magnetic resonance imaging (fMRI) scan. Structural equation modeling was used to compare young and older adults' connectivity among regions of the emotional memory network while they encoded negative or positive items.Results-Aging did not impact the connectivity among regions engaged during the encoding of negative information, but age differences did arise during the encoding of positive information. Most notably, in older adults, the ventromedial prefrontal cortex and amygdala strongly influenced hippocampal activity during the encoding of positive information. By contrast, in young adults, a strong thalamic influence on hippocampal activity was evident during encoding.Conclusions-These findings suggest that older adults' "positivity effect" may arise from agerelated changes in the interactions between affect-processing regions and the hippocampus during the encoding of positive information.

Recent findings have revealed age-related changes in neural recruitment during the processing of emotional information. The present study examined whether these age-related changes would be more pronounced for words, thought to be processed in a controlled manner versus relatively automatically processed pictures. Compared to young adults, older adults showed less amygdala activation, and more medial prefrontal cortex (PFC) activation, for negative than positive pictures. The opposite pattern was observed for words. Older adults showed a positivity effect in memory for words, but not for pictures, suggesting that their positivity effect may stem from age-related changes in medial PFC engagement during encoding.