The development of the ability to categorize speech sounds is often viewed as occurring primarily during infancy via perceptual learning mechanisms. However, a number of studies suggest that even after infancy, children's categories become more categorical and well defined through about age 12. We investigated the cognitive changes that may be…

The acquisition of complex motor, cognitive, and social skills, like playing a musical instrument or mastering sports or a language, is generally associated with implicit skill learning (SL). Although it is a general view that SL is most effective in childhood, and such skills are best acquired if learning starts early, this idea has rarely been…

Describing how much and what type(s) of change are evident in civic engagement across adolescence is a fundamental starting point for advancing developmental theory in the civic domain. Using five annual waves of data from a large national U.S. sample spanning 8th-12th grades, our study describes civic engagement typologies and transitions in and…

We used three identity processes (i.e., commitment, in-depth exploration, and reconsideration of commitment) from a recently developed model of identity formation to derive empirically identity statuses in a sample of 1952 early and middle adolescents. By means of cluster analysis, we identified five statuses: achievement, foreclosure, moratorium,…

A dual taxonomy is presented to reconcile two incongruous facts about antisocial behavior, that it shows impressive continuity over age, but its prevalence changes dramatically over age, increasing almost tenfold during adolescence. Studying delinquents earlier in life may yield more information about the causes and antecedents of antisocial…