longitudinal study

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longitudinal study

[‚län·jə‚tüd·ən·əl ′stəd·ē]
(psychology)
The study of a group of individuals at regular intervals over a relatively long period of time.

longitudinal study

an investigation which involves making observations of the same group at sequential time intervals. Thus, a longitudinal study of a COHORT of children may be made to assess, for example, the effect of social class on school achievement (see BIRTH COHORT STUDY). Longitudinal studies are used by the National Children's Bureau to document various aspects of children's development in the UK. However, longitudinal studies are not only appropriate for studying human development or change, they may also be used to observe change over time within organizations.

The advantage of longitudinal studies compared with CROSS-SECTIONAL STUDIES is that the causal factor involved in a sequence of changes an be directly explored using data collected before and after changes (e.g. analysis of the effect of changes in the school curriculum). The main disadvantages are the greater expense of repeated study, the possible HAWTHORNE EFFECT of repeated studies and the influence of other changes which may be occurring concurrently (e.g. changes in the school curriculum may take place at the same time as changes in the resourcing of educational services). Compare PANEL STUDY.

References in periodicals archive ?
This graduate textbook for courses on longitudinal data analysis and latent growth modeling in the social, educational, and behavioral sciences, reviews the descriptive statistics and plotting of longitudinal data necessary for analyzing change then introduces the linear growth model and expands the model to examine between-person differences in linear change.
The composition of longitudinal data from the OES survey is affected not only by the sample design but also by differential response rates to the OES survey.
Tenders are invited for School Empowerment and Excellence (i4see) and Statewide Longitudinal Data System (SLDS) Related Initiatives Acrobat Reader
Significance of longitudinal data analysis in psychiatric research
Publisher: National Center for Analysis of Longitudinal Data in Education Research.
Applied longitudinal data analysis for epidemiology; a practical guide, 2d ed.
The data center's mission is to support child welfare agencies in using longitudinal data and cutting-edge information technology to improve outcomes for children.
EVERY STATE IN THE COUNTRY NOW HAS a longitudinal data system extending beyond test scores, according to the Data Quality Campaign's seventh annual Data for Action analysis.
305A has been revised to include a new research topic, Analysis of Longitudinal Data to Support State and Local Education Reform.
According to the latest annual report released by the Data Quality Campaign, every state is on track to have a longitudinal data system that follows student progress from preschool through college by 2011.
of the Basque Country, Spain) describe a class of models for longitudinal data know as antedependence models or transition models, which postulate that certain conditional independencies exist among the observations that are related to their time ordering.
Secretary of Education's Commission on the Future of Higher Education calls for the creation of a "national student unit record tracking system" to collect longitudinal data on college students--and that doesn't sit well with educators.

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