Quite. Investigator prejudice/bias - which I mentioned because it seems to me very possible in this case - is, surely, only one of many ways to arrive at dubious results.

I can think of a few other possiblilities:

- Cultural and social influences (such as you mentioned)
- Knowledge, or suspicion, about the anticipated outcome of the investigation.
- Knowledge, or suspicion, about the answer that the particular questioner wants to hear.
- The question structure.

I view psychology as a difficult and nebulous subject, and tend to take such surveys with the proverbial pinch-of-salt.


"Time is what prevents everything from happening at once" - John Wheeler