Longitudinal Studies
Sociology: AQA A Level, topic 1.3.4
Longitudinal Studies
A longitudinal study is a form of on-going survey.
Longitudinal studies
- A longitudinal study is a form of on-going survey.
- The researcher selects a sample and then collects data at regular intervals, often over a period of years.
- Longitudinal studies can show change over time, such as the 10-year census.
Strengths of longitudinal studies
- They avoid ethical problems, as participation requires informed consent and the agreement of those selected.
- By comparing earlier and later data from the same sample, it is possible to discover patterns, trends and the causes of change over time.
- The data is seen as more valid, as discrepancies can be checked against previous data.
Weaknesses of longitudinal studies
- It’s difficult to obtain funding for longitudinal studies, as many funding agencies are reluctant to make a long-term financial commitment.
- Samples are difficult to obtain because of the commitment required by the participants; participants may also withdraw at any point during the study, reducing the sample size.
- Because people know that they are being studied, research is likely to fall victim to the Hawthorne effect.
Test yourself on Longitudinal Studies
What is an example of a longitudinal study?