Throughout childhood and adolescence, humans experience marked changes in cortical structure and cognitive ability. Cortical thickness and surface area, in particular, have been associated with cognitive ability. Here we ask the question: What are the time-related associations between cognitive changes and cortical structure maturation.…

Sleep spindles are related to sleep-dependent memory consolidation and general cognitive abilities. However, they undergo drastic maturational changes during adolescence. Here we used a longitudinal approach (across 7 years) to explore whether developmental changes in sleep spindle density can explain individual differences in sleep-dependent…

This prospective study examined the developmental changes over time of adolescents diagnosed in toddlerhood with autism spectrum disorder and searched for child characteristics at toddlerhood that predict outcome at adolescence. The study included 65 participants who were divided into low cognitive (developmental quotient [less than] 85; N = 41)…

The goal of this research synthesis is to evaluate the validity of the claim that there are fundamental limitations on the ability of adolescents to engage in critical thinking. Critical thinking is defined as an analytic, focused cognitive activity aimed at understanding phenomena at a root rather than a superficial level; a type of thinking…

This bulletin on intellectual growth and development during the adolescent period is a cumulation of (1) a study of the results on certain aptitude tests used in the War Department adapted for secondary schools (2) an analysis of the research studies on the subject of intellectual abilities at the secondary school level. It is published with the…

A longitudinal study of early adolescents examined gender differences in attitude and behavior, as well as the effects of pubertal change, parental expectations, and parental support. It was hypothesized that sex differences would emerge during preadolescence and that males' and females' rates of change would be significantly different. Subjects…