An alternate method of asking questions
Face-to-face, and can provide more detailed information and is a more natural and flexible approach to questioning.
Advantages:
- Qualitative, as great detail can be harnessed
- Participant can express themselves as they please
- Unstructured interviews allows honesty in a participant. This raises the potential of psychological enquiry
- If unstructured, the interview runs the risk of being weak in terms of statistical analysis
- Interviews take longer than questionnaires
- Increased risks of investigator effects e.g. interpersonal variables will increase
Case Study
A gathering of detailed information concerning an individual or a group of people
This makes it idiographic- relating to individual cases or events
Case studies can be longitudinal or retrospective
Advantages:
- Produces descriptive, qualitative data that is rich in detail
- High realism, therefore high ecological validity
- Known to challenge new psychological insights
- Reliability of data can be varied as case studies are difficult to replicate
- Low population validity due to difficulty of generalising the study beyond the individual or group being studied
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