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A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e.g., people) over long periods of time (i.e., uses longitudinal data). It is often a type of observational study, although it can also be structured as longitudinal randomized experiment. [1]
The National Longitudinal Study of the High School Class of 1972 (NLS-72) was a comprehensive study conducted to track the educational, vocational, and personal development of high school seniors who graduated in 1972. NLS-72 was implemented by the National Center for Education Statistics (NCES), a division of the U.S. Department of Education.
Panel data is a subset of longitudinal data where observations are for the same subjects each time. Time series and cross-sectional data can be thought of as special cases of panel data that are in one dimension only (one panel member or individual for the former, one time point for the latter).
The National Longitudinal Survey of Youth 1997 (NLSY97), the newest survey in the NLS program, is a sample of 8,984 young men and women born during the years 1980 through 1984 and living in the United States when first interviewed. Survey respondents were ages 12 to 17 when first interviewed in 1997.
Logo. High School and Beyond (HS&B) is a longitudinal study of a nationally representative sample of people who were high school sophomores and seniors in 1980.The study was originally funded by the United States Department of Education’s National Center for Education Statistics (NCES) as a part of their Secondary Longitudinal Studies Program.
A popular repeated-measures design is the crossover study. A crossover study is a longitudinal study in which subjects receive a sequence of different treatments (or exposures). While crossover studies can be observational studies, many important crossover studies are controlled experiments.
The National Longitudinal Study of Adolescent to Adult Health, also known as Add Health, is a multiwave longitudinal study of adolescents in the United States.It was begun in 1994 in response to a Congressional mandate to study adolescent health, and was initially called the National Longitudinal Study of Adolescent Health. [1]
The Early Childhood Longitudinal Study (ECLS) program provides data about the development of children in the United States. [1] It is carried out by the Institute of Education Sciences. It provides data on children's status at birth and at various points thereafter.