Research support for normative influence
Type: Strength
Study: Kohnken et al. (1999)
Meta-analysis of 53 studies.
- Found 34% average increase in the amount of correct information generated in cognitive interview, compared to standard interviewing techniques
- Suggests that the cognitive interview is an effective technique for increasing the amount of correct information generated
- However, the effectiveness of cognitive interview may be due to individual elements of the cognitive interview rather than the whole process