A strength of Milgram's experiment is that it was a lab study which gives it morecontrol over extraneous variables
One strength of Milgram's experiment being a lab study is that he can more easily establish a cause and effect relationship between changing variables and obedience levels
One weakness of Milgram's study is demand characteristics, the participants may not have believed that the shocks they were giving were real and may be going along to please the experimenter
A counterpoint to Milgram's study having demand characteristics is that participants felt guilty and upset when giving shocks, they sweated, protested and had strong emotional reactions.
One criticism of Milgram's study is that it lacks ecological validity, it is unlikely to occur in real life and is an unfamiliar situation which may cause the participants to behave differently
Milgram only recruited young white American males (androcentric bias), can't be generalised to the population (lacks population validity).