Little research has examined changes in personal identity over different periods of adult development. The aim of the present cross-sectional study was to target these changes through the characterization of the main dimensions in self-defining memories (SDMs; thematic content, specificity, integrative meaning, tension, contamination/redemption,…

This study examined age-related patterns in exposure and affective reactivity to daily stressors across a 20-year time span among adults who were between 22 and 77 years old at their baseline interview. Longitudinal data from the National Study of Daily Experiences (NSDE) consisted of three bursts of eight consecutive nightly interviews of stress…

Friends are a vital source of social relations throughout the lifespan and across developmental stages. Our knowledge of how friendships develop over time, especially from childhood through adulthood, is limited. Furthermore, it is now recognized that this specific type of relationship influences health across the life course in unique ways. Using…

Existing research focused on social role destabilization (historical increases in role instability) and destandardization (historical increases in variability of role instability) has primarily focused on discrete social roles during discrete periods of development. Building on this work, we applied a macro approach to elucidate the extent to…

Though Erikson recognized identity development as a lifelong project, most research on identity has focused on adolescents and emerging adults. Less is known about how the identity formed in adolescence is maintained and adapted across the adult life span. The purpose of the present paper is to provide a conceptual review and elaboration of…

Developmental science suggests that the consequences of mental health problems for life-course outcomes may depend on the timing of their onset. This study investigated the extent to which mental health predicted educational attainment at ages 17, 20, and 25 and whether gender moderated the links between mental health and educational attainment.…

A well-documented finding in aging and emotion research is that older adults reliably report less negative and, often, more positive affect than younger adults. How older people accomplish this is, however, an open question. We propose that this age effect is the result of differential use of emotion regulation strategies, especially when…

As adults, we might understand that beliefs often spread because people are strongly influenced by their friends, family, and other social connections. However, do we think those influences are strong enough to overrule direct evidence of a friend's unreliability? And do preschoolers expect people to show such biases toward friends and to…

Ostracism, that is, being excluded and ignored by others, is a highly painful and threatening experience for individuals. Most empirical research on ostracism has been carried out in the lab or focused on samples in specific contexts. Here, we investigate the effects of age on how individuals experience ostracism within a broad, representative…

Humans appear to intuitively grasp definitions foundational to formal geometry, like definitions that describe points as infinitely small and lines as infinitely long. Nevertheless, previous studies exploring human's intuitive natural geometry have consistently focused on geometric principles in planar Euclidean contexts and thus may not…

Many caregivers wonder when to talk to children about social inequality and racism, often expressing the belief that children do not pay attention to race or inequity. Here, across 5-9-year-old American children (n = 159, M[subscript age] = 7.44; 51.6% female, 47.2% male, 1.2% nonconforming or not provided; 59.1% White, 23.3% racial-ethnic…

Children's early environmental experiences are often considered highly influential for later life development. Yet, environmental contexts, such as the home and early care and education (ECE) setting, and multiple aspects of each setting, are not typically examined concurrently. In this study, we examined associations between cognitive stimulation…

The study investigated age-related trends in moral identity goal characteristics, as proposed in previous research (Krettenauer, 2022a), by modifying the Self-Importance of Moral Identity Questionnaire (Aquino & Reed, 2002). Internally and externally motivated moral identity was assessed on varying levels of abstractness for promotion…

Natural languages distinguish between telic predicates that denote events leading to an inherent endpoint (e.g., "draw a balloon") and atelic predicates that denote events with no inherent endpoint (e.g., "draw balloons"). Telicity distinctions in many languages are already partly available to 4-5-year-olds. Here, using…

Participants ranging in age from 3 to 98 years (N = 708; approximately 60% female; 49% Caucasian, 38% Asian; 12% Other ethnicities, 1% Indigenous; modal household income > $80,000) completed a battery of tasks involving verbal ability, executive function, and perspective-taking. Wherever possible, all participants completed the same version of…