Clarifies intentions and basis of remarks made in Macfarlane (1963) concerning the relationship of early character structure to later character structure and life outcomes. (Author/RH)

The developmental significance of unresponsive or uncooperative behavior of children in standardized developmental assessments made during the preschool years was investigated. Untestable children were significantly lower than testable children on a wide range of abilities at all ages from 12 through 72 months. (PCB)

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…

Introduces structural modeling with nonnormal continuous variables, using the equations language of the micro-mainframe program EQS in the context of a longitudinal study of adolescent development that followed about 700 adolescents across an 8-year span into young adulthood. Two models are developed to assess the influence of drug use on…

The effects of selective dropout and retesting on the assessment of developmental changes in abilities during adolescence are examined. (ST)

Suggests that designing home-based interventions as longitudinal development research (rather than outcome evaluation) can provide valuable knowledge about ecological factors that affect the development of competence in parents and children and about effective ways to support families. (Author/MP)