Developmental scientists are often interested in subgroups of people who share commonalities in aspects of development; these subgroups often cannot be captured directly but instead must be inferred from other information. Mixture models can be used in these situations. Two specific types of mixture models, latent profile transition analyses and…

This commentary discusses the implication of child and adolescent development research for public policy in Latin America. As illustrated by the articles in this special issue, even though the research of child and adolescent development in Latin America is making significant progress, still more research is needed. Developmental research in the…

Developmental science rests on describing, explaining, and optimizing intraindividual changes and, hence, empirically requires longitudinal research. Problems of missing data arise in most longitudinal studies, thus creating challenges for interpreting the substance and structure of intraindividual change. Using a sample of reports of longitudinal…

The California Healthy Kids Survey (CHKS) is a comprehensive youth health risk and resilience data collection service for local education agencies (LEAs) sponsored by the California Department of Education (CDE). It is an easily customized, comprehensive self-report youth survey for grades 5-12. It assesses all major areas of health-related risk…

As demand for after-school services has grown, the public has responded with support for growth in federal, state, and local funding for these services. As in other successful grassroots movements, this high level of support is evident across groups with diverse objectives. Some after-school advocates are mainly interested in increasing the supply…

This report summarizes findings from a study of the psychometric properties of the resilience and youth development module, a key component of the Healthy Kids Survey. The study aims to improve resilience assessment and research so that educators can shape the school environment to promote academic resilience. The Healthy Kids Survey (HKS) is a…

There is a need for educational research even during financial difficulties. Wisdom and efficiency in spending, careful data collection, and collaboration among agencies should be important goals while resources are scarce. Considering the situation, this paper describes critical issues in elementary and secondary education and the manner in which…