This study examined whether individual differences in personality (development) from adolescence to emerging adulthood were associated with burnout and happiness in emerging adulthood. At Time 1 (2009; M[subscript age] = 15.7 years), Time 2 (2012), and Time 3 (2015), Belgian participants (N = 329; 43.1% boys) reported on the personality dimensions…

To illuminate individual differences in the development of attention-deficit hyperactivity disorder (ADHD) symptoms in the general population, psychometric measures are needed that can capture general population-level symptom variation reliably, validly, and comparably from childhood through to the transition to adulthood. The ADHD subscale of the…

In this article, we aim to shed light on a technique to study intra-individual variability that spans the time frame of seconds and minutes, i.e., micro-level development. This form of variability is omnipresent in behavioural development and processes of human experience, yet is often ignored in empirical studies, given a lack of proper analysis…

Lifespan research has long been interested in how contexts shape individual development. Using the separation and later reunification of Germany as a kind of natural experiment we examine whether and how living and dying in the former East or West German context has differentially shaped late-life development of well-being. We apply multi-level…

Experiencing the moral emotions of gratitude and moral elevation are responses to witnessing virtuous deeds of others. Both emotions have been found to share similar features and behavioral consequences, including the stimulation of personal development. The broaden-and-build theory of positive emotions indicates that gratitude and elevation…

The concurrent and longitudinal associations between popularity, likeability, and prosocial behavior were evaluated in this three-year study of middle school and high school Chinese adolescents. The initial sample included 766 middle school (mean age = 13.3 years) and 668 high school participants (mean age = 16.6 years); there were 880 (399 girls)…

Most longitudinal studies are plagued by drop-out related to variables at earlier assessments (systematic attrition). Although systematic attrition is often analysed in longitudinal studies, surprisingly few researchers attempt to reduce biases due to systematic attrition, even though this is possible and nowadays technically easy. This is…

This study compared the romantic involvements of Canadian and Chinese adolescents as well as linkages with friend and parental relationships. Participants were 496 Chinese adolescents and 395 Canadian adolescents, aged 16-17 years. Chinese adolescents were less likely to have any form of romantic involvement, including a romantic relationship,…

In Experiment 1, Japanese children (4-, 5-, 7-, and 10-year-olds (n = 78)) and adults (n = 36), answered questions about the possibility of psychogenic bodily reactions, i.e., bodily outcomes with origins in the mind. The 4- and 5-year-old preschoolers typically denied that bodily conditions could originate in mental states. Developmentally,…

Planning for the future and developing a personalized identity are conceived of as important developmental tasks that adolescents and emerging adults are confronted with on the pathway to adulthood. The present study set out to examine whether both tasks develop in tandem by using a short-term longitudinal dataset consisting of 371 college…

The timing of having one's first child, in relation to the timing of other transitions into adulthood and to social functioning, was investigated based on the Finnish Jyvaskyla Longitudinal Study of Personality and Social Development, conducted from age 8 (173 females and 196 males) to 42. Results showed that in women, relatively early (less than…

Little work has been done to examine emerging adulthood in Eastern European countries such as Romania that are making the transition out of communism into the broader free-market economy of Western Europe. The purpose of this study was to (a) examine the criteria that college students in Romania have for adulthood, and (b) explore whether…

A new action-theoretical conceptualization was used to study developmental differences in children's generalized perceived control. Cross-sectional age differences in control beliefs, means-ends beliefs, and agency beliefs about school performance and friendship were studied in 240 boys and girls between 7 and 12 years of age. (RH)

Investigated development of altruism in children according to a theoretical perspective that integrated Piagetian micromodels accounting for change from preoperational to operational stages. Subjects were 90 children of 5-12 years of age. Older children were more likely to consider an altruistic act in terms of gain construction than cost…

Children who left a gap between the sky and the horizon in their drawings and paintings were significantly younger than those who left no gap. Omission of the gap was associated with the use of devices to represent three-dimensional space in two dimensions. (RH)