6.1.13

Longitudinal Studies

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Longitudinal Studies

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Longitudinal Studies

  • A study of people over a long period of time.
  • The aim is to record the changes over time.
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  • Longitudinal studies are useful when the researcher wants to:
    • Track changes in the individual.
    • AND track changes in the group that the individual is part of.
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Advantages

  • Researchers use longitudinal studies to monitor changes in many aspects of people's social lives such as educational achievement, employment and poverty.
  • Longitudinal studies are valid since qualitative data is collected through observations and interviews.
  • Longitudinal studies can track changes and establish trends.
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Disadvantages

  • They are time consuming.
  • They are costly since it is hard to keep track of the participants over time as they might move somewhere else.
  • The participants might decide at some point they don’t want any longer to be part of the study because of illness, death, personal reasons, i.e. the attrition rate.
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Disadvantages cont.

  • If many participants decide to withdraw, the chances are that the sample will no longer be representative.
  • A non-representative sample means that the data collected cannot be used to make generalisations.
  • Participants might change their behaviour because they know they are being monitored, producing invalid data (observer effect).

Jump to other topics

1The Sociological Approach

2Families

3Education

4Crime & Deviance

5Social Stratification

6Sociological Research Methods

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