Detailed study of a single individual or a small group of people. Conducting a case study usually (but not always) involves the production of qualitative data.
Researchers will construct a case history of the individual concerned using interviews, observations, questionnaires or psychological testing to assess what they are (or are not) capable of. Testing may produce quantitative data.
Triangulation
using more than one method to check the validity of the findings.
generally longitudinal studies
Longitudinal studies
follow the individual or group over an extended period of time.
Longitudinal study strengths
allows to look at changes over time
Longitudinal study limitation
participants may drop out which can lead to a small sample size. The number of people dropping out is the attrition rate.
