To investigate the normative trajectory of self-esteem across the life span, this meta-analysis
synthesizes the available longitudinal data on mean-level change in self-esteem. The …

Remediating deficits and managing disabilities has been a central preoccupation for clinical
psychologists. Positive Psychology, in contrast, is concerned with the enhancement of …

What basic personality traits characterize the psychologically healthy individual? The
purpose of this article was to address this question by generating an expert-consensus …

Self-concept clarity and self-esteem are powerful determinants of people's thoughts,
feelings, and behaviors. Yet, even after over 30 years of research, the conceptual and …

Internalizing and externalizing behavior problems are established risk factors for many
unpleasant outcomes and psychopathology in adulthood, and understanding the interplay …

Political orientation is often assumed to be shaped by socialization processes; however,
previous studies have shown substantial genetic variance components in party affiliation …

The German Twin Family Panel (TwinLife) is a German longitudinal study of monozygotic
and dizygotic same-sex twin pairs and their families that was designed to investigate the …

Dr. Irving I. Gottesman was very creative in applying twin research designs to test
hypotheses and predictions about human behavior. Two designs stand out among others …

Studies examining the interplay between children's academic ability and parental
background are rare, and their findings are mixed and inconclusive. This paper addresses …

Guided by the dual-factor model and self-determination theory, this study explored the
relationship between parental autonomy support and mental health (ie, life satisfaction and …