The goal of this article was to examine gender-typed behavior longitudinally and to consider its relationship with sexual orientation in adulthood. Data were from 10,624 respondents who completed Wave 1 (adolescence), Wave 3 (emerging adulthood), and Wave 4 (early adulthood) of the National Longitudinal Study of Adolescent to Adult Health. First,…

Infants intentionally communicate with others from before their 1st birthday. But there is some question about how they understand the communicative process. Do they understand that for their request to work the recipient must both understand the request and be cooperatively disposed to fulfill it? On the basis of the study by Shwe and Markman…

The present study examined the joint development of substance use and externalizing problems in early and middle adolescence. First, it was tested whether the relevant groups found in previous studies i.e., those with an early onset, a late onset, and no onset or low levels of risk behavior could be identified, while using a developmental model of…

The authors examined internal representations of conditional strategies for a situation of object conflict in 849 adolescents and young adults between the ages of 11 and 19 years. To examine participants' expectations of strategy use, the authors developed questionnaires that depicted a variety of contexts in which 2 people wanted an object that…

The attention deficit hyperactivity disorder (ADHD) symptom presentation of young adolescents with ADHD was examined in association with the transition to middle school. This study used data collected in the Multimodal Treatment Study of ADHD, which included children between 7 and 9 years of age with a diagnosis of ADHD (n = 258) and grade- and…

Confirmatory factor analyses were conducted of "Diagnostic and Statistical Manual of Mental Disorders", Fourth Edition (DSM-IV) symptoms of common mental disorders derived from structured interviews of a representative sample of 4,049 twin children and adolescents and their adult caretakers. A dimensional model based on the assignment of symptoms…

The purpose of this study is to examine the underlying construct of overexcitabilities (OEs) and to identify individual- and family-level factors that may explain gifted students' patterns of OEs. Data are collected from a convenience sample of identified gifted students (N = 143) and their parents (N = 161) using a Likert-type questionnaire, the…

Designed to explore (1) developmental changes in exact and partial imitation of manual and facial movements, (2) model differences, and (3) gesture differences, this study observed infants at 2, 12, and 24 weeks of age. A hypothesis is proposed that links early nonselective behaviors and attributed imitation to emergence of imitative behavior…

Kindergarten and fourth-grade children participated in a study designed to assess the effects of number of models and type of behavior modeled on developmental differences of children's subsequent generosity. As predicted, generosity of younger children was affected by behavior of model(s) to a greater extent than was that of older children.…

Recent experimental research is synthesized to identify distinctive biobehavioral characteristics of Down's Syndrome persons across their lifespan. It is argued that educational and other intervention programs have not demonstrated strong gains having significant durability or generalization. Recommended is an interactionist function-structure…

Studied a social developmental model of discounting. Experiments showed that discounting increased according to the degree of similarity between the task situation and subjects' earlier experience. Although older children discounted consistently, younger children discounted only after a relevant script-generating experience. (RJC)

This investigation addresses problems of defining verbal imitation, and suggests solutions by analyzing verbal interactions between two children and their mothers. Children were between 18 and 35 months old, with a mean length of utterance between 1.4 and 4.2 morphemes. Analyses focus upon the uses these children made of maternal models; 10…

Research on trait descriptions of interpersonal behavior tends to converge on a two-dimensional representation in which descriptive variables are arrayed in a circular fashion around the major axes of affiliation and dominance. Wiggins' self-report adjective checklist (1979) reflects this theoretical ordering. To explore the utility of Wiggins'…

Reports the results of stage two of a three-stage project designed to develop, through field testing, a model for determining the norms of general adult communication behavior. Discusses implications of this study, including those for planners of communication instruction. (PD)

Relative fits of 3 factor-structure models of adolescent reckless behavior were examined using the 10-item Reckless Behavior Questionnaire with 1,357 college and 181 high school students. Both one- and two-factor models were found to be satisfactory representations. Implications of a study of construct validity are discussed. (SLD)