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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 Genetic Studies of Genius, later known as the Terman Study of the Gifted, [1] is currently the oldest and longest-running longitudinal study in the field of psychology. . It was begun by Lewis Terman at Stanford University in 1921 to examine the development and characteristics of gifted children into adultho
Repeated measures design is a research design that involves multiple measures of the same variable taken on the same or matched subjects either under different conditions or over two or more time periods. [1] For instance, repeated measurements are collected in a longitudinal study in which change over time is assessed.
The Grant Study is an 86-year continuing longitudinal study from the Study of Adult Development at Harvard Medical School, started in 1938. [2] It has followed 268 Harvard-educated men, the majority of whom were members of the undergraduate classes of 1942, 1943 and 1944.
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.
The prospective study is important for research on the etiology of diseases and disorders. The distinguishing feature of a prospective cohort study is that at the time the investigators begin enrolling subjects and collecting baseline exposure information, none of the subjects have developed any of the outcomes of interest. [ 2 ]
Professor Rose Anne Kenny, the chair of medical gerontology at Trinity College Dublin and the head of The Irish Longitudinal Study on Ageing, argues that socializing is more important for ...
A cohort study is a particular form of longitudinal study that samples a cohort (a group of people who share a defining characteristic, typically those who experienced a common event in a selected period, such as birth or graduation), performing a cross-section at intervals through time.