Specific autobiographical memories are a resource for identity strength among mature but not emerging adults.

Four studies, three pre-planned on Open Science Framework, with 2296 participants explored the potential role of recollecting autobiographical memories in enhancing the sense of identity. Among emerging adults (college students under age 25), recollecting important autobiographical memories did not strengthen sense of identity. Autobiographical memories failed to strengthen identity among emerging adults despite inducing low self-clarity first; despite attempts to prime self-consistent memories by having emerging adults report their stable self-aspects first; and despite attempts to inspire self-event connections by asking emerging adults to explain how the memories exemplified something enduring about the self. Among mature adults (age 25 and older), recollecting important autobiographical memories strengthened sense of identity. Identity was strengthened regardless of whether mature adults were asked to explain how the memories exemplified something enduring about the self. Differences in types of memories or motivation did not account for the differential effects of recollecting autobiographical memories in identity. In short, mature adults appear to readily use autobiographical memories as a resource for identity in a way that emerging adults have not yet mastered.

Sharing specific "We" autobiographical memories in close relationships: the role of contact frequency.

Sharing memories in conversations with close others is posited to be part of the social function of autobiographical memory. The present research focused on the sharing of a particular type of memory: Specific memories about one-time co-experienced events, which we termed Specific We memories. Two studies with 595 total participants examined the factors that lead to and/or are influenced by the sharing of Specific We memories. In Study 1, participants reported on their most recent conversation. Specific We memories were reportedly discussed most often in conversations with others who were close and with whom the participant had frequent communication. In Study 2, participants were randomly assigned either to increase or to simply record the frequency of communication with a close other (parent). Increases in the frequency of reported sharing of Specific We memories as well as closeness to the parent resulted. Mediation analyses of both studies revealed causal relationships among reported sharing of Specific We memories and closeness. We discuss the relevance of these results for understanding the social function of autobiographical memory.

Basal Hippocampal Activity and Its Functional Connectivity Predicts Cocaine Relapse.

BACKGROUND: Cocaine-induced neuroplastic changes may result in a heightened propensity for relapse. Using regional cerebral blood flow (rCBF) as a marker of basal neuronal activity, this study assessed alterations in rCBF and related resting state functional connectivity (rsFC) to prospectively predict relapse in patients following treatment for cocaine use disorder (CUD). METHODS: Pseudocontinuous arterial spin labeling functional magnetic resonance imaging and resting blood oxygen level-dependent functional magnetic resonance imaging data were acquired in the same scan session in abstinent participants with CUD before residential treatment discharge and in 20 healthy matched control subjects. Substance use was assessed twice weekly following discharge. Relapsed participants were defined as those who used stimulants within 30 days following treatment discharge (n = 22); early remission participants (n = 18) did not. RESULTS: Voxel-wise, whole-brain analysis revealed enhanced rCBF only in the left posterior hippocampus (pHp) in the relapsed group compared with the early remission and control groups. Using this pHp as a seed, increased rsFC strength with the posterior cingulate cortex (PCC)/precuneus was seen in the relapsed versus early remission subgroups. Together, both increased pHp rCBF and strengthened pHp-PCC rsFC predicted relapse with 75% accuracy at 30, 60, and 90 days following treatment. CONCLUSIONS: In CUD participants at risk of early relapse, increased pHp basal activity and pHp-PCC circuit strength may reflect the propensity for heightened reactivity to cocaine cues and persistent cocaine-related ruminations. Mechanisms to mute hyperactivated brain regions and delink dysregulated neural circuits may prove useful to prevent relapse in patients with CUD.