(But this doesn't work for women. The author of the study, Professor Changiz Mohiyeddini, said:
"It seems that men have an effective behavioural strategy – fidgeting - to combat their nervousness, but for women, the same behaviour actually makes things much worse."
It's been so long since I was at an interview I can't really comment on whether I fidget or not, but I have the sneaking suspicion that I go tharn.)