Uncertainty of obedience vs. demand characteristics
The results may be due to participants seeing through the deception, raising uncertainty about the true level of obedience
Limitation: Lack of internal validity
Participants may have realized that the procedure was fake, limiting the internal validity of the study
Strength: Cross-cultural replications
The findings have been replicated in other cultures, for example, Spanish students showed a 90% obedience rate
Strength: Research support
A field experiment in NYC showed higher obedience to a security guard, providing research support
Effect of uniform on obedience rates
The obedience rate dropped to 20% (the lowest of the variations) when the experimenter dressed in everyday clothes instead of a lab coat
Effect of location on obedience rates
The obedience rates fell to 47.5% when the study was conducted in a run-down building instead of a prestigious university, due to the experimenter having less authority
Effect of proximity on obedience rate
The obedience rate dropped from 65% to 40% when the teacher and learner were placed in the same room
Uniform
The clothing worn by the experimenter
Location
The setting where the study is conducted
Proximity
Physical closeness between the teacher and the learner