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longitudinal study |
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longitudinal study a chronological study in epidemiology which attempts to establish a relationship between an antecedent cause and a subsequent effect. See also cohort study. longitudinal study Diachronic study Statistics A study that follows the same persons over time, evaluating the effects of one or more variables on a processtime Examples Cohort studies, case-control studies. Cf Cross-sectional study, Horizontal study. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The longitudinal sample consisted of approximately 430 grade 1 students in immersion programs in four sites in Texas and California from 16 schools. Analyses of the psychometric properties of this index provide evidence for its construct and predictive validity in a longitudinal sample of precoital 12-15-year-old black and white adolescents. Our sample, therefore, is a representative, longitudinal sample of talented young people who attended middle school and high school in the United States (see Curtin, Ingels, Wu, & Heuer, 2002, for information on the NELS:88 sampling design). |
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