ordinary man - evaluation: One strength of this study is other studies support the findings, so it has reliable. Sedikides and Jackson’s zoo study found when the experimenter wore a zoo keeper's uniform, complete with an official patch on the shirt, participants would follow their instructions more than when he wore a T-shirt, shorts, and sandals. This suggests that the participants decrease in obedience was due to the lesser authority the ordinary man has, showing a cause effect relationship between decreased authority and decreased obedience.