The accumulation of adversity in midlife: Effects on depressive symptoms, life satisfaction, and character strengths.

Middle-aged adults are a central pillar of society because they comprise large segments of the workforce and bridge younger and older generations. Given the significant role that middle-aged adults play for the greater good of society, more research is warranted to evaluate in which ways adversity could accumulate or pile-up to impact pertinent outcomes. We used data from a sample of middle-aged adults (n = 317, age 50-65 at baseline, 55% women) who were assessed monthly for a period of 2 years to examine whether the accumulation of adversity was predictive of depressive symptoms, life satisfaction, and character strengths (generativity, gratitude, the presence of meaning, and search for meaning). Greater accumulation of adversity was associated with reporting more depressive symptoms, lower life satisfaction, and the lower presence of meaning and the effects remained for depressive symptoms when accounting for concurrent adversity. More concurrent adversity was associated with reporting more depressive symptoms and lower life satisfaction and lower levels of generativity, gratitude, and the presence of meaning. Analyses that targeted specific domains of adversity showed that the accumulation of adversity associated with close family members (i.e., spouse/partner, children, and parents), and financial, and work domains showed the strongest (negative) associations across each outcome. Our findings demonstrate that monthly adversity take its toll on pertinent midlife outcomes and points to future research targeting mechanisms underlying our findings as well as resources that promote positive outcomes. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

The sound of one-hand clapping: handedness and perisylvian neural correlates of a communicative gesture in chimpanzees.

Whether lateralization of communicative signalling in non-human primates might constitute prerequisites of hemispheric specialization for language is unclear. In the present study, we examined (i) hand preference for a communicative gesture (clapping in 94 captive chimpanzees from two research facilities) and (ii) the in vivo magnetic resonance imaging brain scans of 40 of these individuals. The preferred hand for clapping was defined as the one in the upper position when the two hands came together. Using computer manual tracing of regions of interest, we measured the neuroanatomical asymmetries for the homologues of key language areas, including the inferior frontal gyrus (IFG) and planum temporale (PT). When considering the entire sample, there was a predominance of right-handedness for clapping and the distribution of right- and left-handed individuals did not differ between the two facilities. The direction of hand preference (right- versus left-handed subjects) for clapping explained a significant portion of variability in asymmetries of the PT and IFG. The results are consistent with the view that gestural communication in the common ancestor may have been a precursor of language and its cerebral substrates in modern humans.