· The gathering of data on a particular group of people over an extended period of time.
Examples: J.W.B. Douglas’ (1964) study of home life and education, the Child Health and Education Survey and the British Household Panel Survey used by Bertoud and Gershuny (2000) in the study of family life.
Advantages:
· People do not have to report on events retrospectively so problems of faulty memory or reinterpretation of events are reduced.
· It can be used to examine a large number of variables.
Disadvantages:
· The size of sample is liable to fall as some individuals become unwilling to continue to take part, or prove impossible to trace, effecting reliability of findings.
For example, Douglas’s original sample of 4,720 by 1962. Since those who were lost may not have been representative and may be distort.
· Whatever method is used will have limitations.
· Taking part in the study might affect subjects’ behavior.
For example:Child development
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