Personality and Peripartum Changes in Perceived Social Support: Findings From Two Prospective-Longitudinal Studies in (Expectant) Mothers and Fathers

Associations between adolescent friends' responses during problem talk and depressive symptoms

The present study examined how friends' responses to each other during problem talk predicted depressive symptoms over time. Participants included 271 adolescent friend dyads (69 female and 69 male early adolescent dyads; 72 female and 61 male middle adolescent dyads; 66.4% White and 26.6% Black). The adolescents were observed discussing a problem with the friend and reported on depressive symptoms at the time of observation and 9 months later. Friends' responses were coded into one of nine response type categories (i.e., four positive/engaged response types, one neutral response type, and four negative/disengaged response types). Actor-partner interdependence models revealed significant actor and partner effects for both positive and negative responses. Notably, receiving and/or producing positive/engaged responses, including saying something supportive, sharing related experiences, and asking questions, were associated with lower depressive symptoms over time. Receiving and/or producing negative/disengaged responses, including sharing one's own experience in a distracting way, changing the subject, saying something unsupportive or minimizing the problem, and saying nothing at all heightened risk for depressive symptoms. Additionally, significant Actor × Partner interactions revealed that greater differences between the friends in the degree to which they produced supportive responses were associated with increased depressive symptoms and that both friends saying nothing at all was associated with increased depressive symptoms. When gender and grade differences were found, the associations typically were particularly strong for middle-adolescent girls. These results highlight the importance of attending to friends' specific behaviors in social support contexts. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

It's About Time: The Circadian Network as Time-Keeper for Cognitive Functioning, Locomotor Activity and Mental Health

A variety of organisms including mammals have evolved a 24h, self-sustained timekeeping machinery known as the circadian clock (biological clock), which enables to anticipate, respond, and adapt to environmental influences such as the daily light and dark cycles. Proper functioning of the clock plays a pivotal role in the temporal regulation of a wide range of cellular, physiological, and behavioural processes. The disruption of circadian rhythms was found to be associated with the onset and progression of several pathologies including sleep and mental disorders, cancer, and neurodegeneration. Thus, the role of the circadian clock in health and disease, and its clinical applications, have gained increasing attention, but the exact mechanisms underlying temporal regulation require further work and the integration of evidence from different research fields. In this review, we address the current knowledge regarding the functioning of molecular circuits as generators of circadian rhythms and the essential role of circadian synchrony in a healthy organism. In particular, we discuss the role of circadian regulation in the context of behaviour and cognitive functioning, delineating how the loss of this tight interplay is linked to pathological development with a focus on mental disorders and neurodegeneration. We further describe emerging new aspects on the link between the circadian clock and physical exercise-induced cognitive functioning, and its current usage as circadian activator with a positive impact in delaying the progression of certain pathologies including neurodegeneration and brain-related disorders. Finally, we discuss recent epidemiological evidence pointing to an important role of the circadian clock in mental health.