Strength = research to support suggestion that uniform can affect obedience. E.g Bickman asked 3 confederates to give orders to passers by on the street. One confederate dressed as security guard, one - milkman and one - civilian clothes. Bickman found regardless of order given, passers by were most likely to obey the confederate dressed as the security guard, and least likely to obey the confederate dressed in civilian clothes. Suggests - in real life settings, ppl more likely to obey individual who is wearing a uniform that suggests legitimacy + authority.