Residential mobility has received notable attention in the literature, yet there remains limited consensus on how and when mobility is associated with detriments to children's development. Drawing on a nationally representative sample of 19,162 children in the Early Childhood Longitudinal Study followed from kindergarten through eighth grade, this…

Argues that nonshared within-family environmental variation is a major influence on general mental performance. Data are presented from longitudinal studies revealing that intraindividual variation over age in IQ accounts for as much or more variability than has been estimated to be the nonshared within-family environmental variability in IQ.…

Challenges the typical treatment of causal effects in longitudinal data, arguing that models should be conceptualized and tested in ways that directly reflect prior assumptions as to the trait- or state-like nature of the variables. Examples demonstrate that meaningful longitudinal studies of state variables can be conducted without assuming their…

Three studies examined the developmental relationship between early linguistic and cognitive achievements. Findings showed that children's ability to classify objects in a spatial or temporal order was independent of advances in productive vocabulary growth, suggesting that developments in categorization and naming depend on abilities in addition…

Investigated genetic change and continuity within the domains of temperament, emotion, and cognition and language for 200 pairs of twins assessed at 14 and 20 months of age. Correlations of measures at the two ages indicated that individual differences in the second year of life showed greater change than continuity on most measures. (MDM)

When pioneering longitudinal studies of child development extended into adulthood, they generated issues that could not be addressed satisfactorily by available theories, including the recognition that individual lives are influenced by their ever-changing historical context and that human development concepts should apply to processes across the…

Fifth through eighth graders completed self-reports in response to pager signals received over one week and again four years later. Responses indicated that thinking about the opposite sex occurs earlier than spending time with the opposite sex alone and that both increase over time. Girls spent more time with opposite sex and more time thinking…

Examined Bowlby's proposition that early experiences and the adaptations to which they give rise influence later development, even beyond the influence of current circumstances or very recent adaptation. Groups whose adaptation were similar during preschool years but consistently different earlier were defined and compared. Results supported…

Studied perceptions of self-competence and task values, documenting domain-specific growth trajectories for 761 children from grade 1 through 12. Found that self- perceptions of competence and subjective task values declined as children got older, although extent and rate of decline varied across domains. Found significant gender differences in…

Examined early development of guilt in 106 children observed in laboratory paradigms in which they were led to believe they had damaged valuable objects during 2 sessions at 22, 33, and 45 months. Found support for a mediational model in which fearful temperament contributed to guilt proneness, which served to inhibit children's tendency to…

Examined consistency in prosocial dispositions, using longitudinal data from preschool through early adulthood. Found that spontaneous prosocial behavior observed in preschools predicted actual prosocial behavior, other- and self-reported prosocial behavior, self-reported sympathy, and perspective taking in childhood to early adulthood. Prosocial…

Maintains that the preceding studies extend a long line of research demonstrating the coherence of individual development in attachment security. Notes that the studies clarify that attachment security can be stable from infancy through early adulthood and that changes in security are meaningfully related to changes in the family environment.…

Examined development of child and adolescent self-concept in two overlapping age cohorts as a function of the self-concept domain, social/developmental/educational transitions, and gender. Structural equation modeling addressed questions about stability of individual differences over time. Multilevel modeling addressed questions about mean-level…

Quantitative growth curve models for estimating individual developmental functions from various types of longitudinal data are discussed in the context of investigator assumptions and research design characteristics. Linear and nonlinear models that estimate growth curves are illustrated, and contrasted when they are fit to speech development…

Predicted children's loneliness and social satisfaction growth curves based on changes in peer victimization status from kindergarten through third grade. Found that trajectories for children moving from nonvictim to victim classification showed increasing loneliness and decreasing social satisfaction. However, moving from victim to nonvictim…