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{{StatsPsy}}
 
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:This article deals with longitudinal studies of human popultions. See [[Longitudinal studies of animals]] for animal populations.
 
A '''longitudinal study''' is a [[correlation|correlational]] research study that involves observations of the same items over long periods of time, often many decades.
 
A '''longitudinal study''' is a [[correlation|correlational]] research study that involves observations of the same items over long periods of time, often many decades.
 
Longitudinal studies are often used in psychology to study developmental trends across the life span. The reason for this is that unlike [[cross-sectional study|cross-sectional studies]], longitudinal studies track the same people, and therefore the differences observed in those people are less likely to be the result of cultural differences across generations. Longitudinal studies are also used in medicine to uncover predictors of certain diseases.
 
Longitudinal studies are often used in psychology to study developmental trends across the life span. The reason for this is that unlike [[cross-sectional study|cross-sectional studies]], longitudinal studies track the same people, and therefore the differences observed in those people are less likely to be the result of cultural differences across generations. Longitudinal studies are also used in medicine to uncover predictors of certain diseases.
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*[http://www.psbh.be Panel Study of Belgian Households]
 
*[http://www.psbh.be Panel Study of Belgian Households]
 
*[[Rotterdam Study]]
 
*[[Rotterdam Study]]
*[[K. Warner Schaie|Seattle Longitudinal Study]]
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*[[Seattle Longitudinal Study]] - aging and cognition
 
*[[Wisconsin Longitudinal Study]] [http://www.ssc.wisc.edu/wlsresearch/]
 
*[[Wisconsin Longitudinal Study]] [http://www.ssc.wisc.edu/wlsresearch/]
 
*[[UK Adult Psychiatric Morbidity Survey]]
 
*[[UK Adult Psychiatric Morbidity Survey]]
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==See also==
 
==See also==
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*[[Crossover study]]
 
*[[Followup studies]]
 
*[[Followup studies]]
 
*[[Prospective studies]]
 
*[[Prospective studies]]
 
*[[Retrospective studies]]
 
*[[Retrospective studies]]
 
   
 
==References & Bibliography==
 
==References & Bibliography==

Latest revision as of 13:37, September 26, 2013

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This article deals with longitudinal studies of human popultions. See Longitudinal studies of animals for animal populations.

A longitudinal study is a correlational research study that involves observations of the same items over long periods of time, often many decades. Longitudinal studies are often used in psychology to study developmental trends across the life span. The reason for this is that unlike cross-sectional studies, longitudinal studies track the same people, and therefore the differences observed in those people are less likely to be the result of cultural differences across generations. Longitudinal studies are also used in medicine to uncover predictors of certain diseases.

Because longitudinal studies are observational, in the sense that they observe the state of the world without manipulating it, they have less power to detect causal relationships than do experiments. But because of the repeated observation at the individual level, they have more power than cross-sectional observational studies, by virtue of being able to exclude time-invariant unobserved individual differences, and by virtue of observing the temporal order of events.

Types of longitudinal studies include cohort studies and panel studies. Cohort studies sample a cohort, defined as a group experiencing some event (typically birth) in a selected time period, and studying them at intervals through time. Panel studies sample a cross-section, and survey it at (usually regular) intervals.

A prospective longitudinal study sets out to test particular hypotheses through analysis of subsequently collected data.

A retrospective study is a longitudinal study that looks back in time. For instance a researcher may look up the medical records of previous years to look for a trend.

ExamplesEdit


Repeated Cross-Sectional SurveysEdit


See alsoEdit

References & BibliographyEdit

Key textsEdit

BooksEdit

PapersEdit

Additional materialEdit

BooksEdit

PapersEdit

External linksEdit

The ESRC United Kingdom Longitudinal Studies Centre


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