lacks ecological validity as comparing lines isn't a day to day activity
the group of participants didn't resemble the groups we conform to in real life
lacks generelizability as only men were used. women may conform more due to concern of being accepted (NETO)
individualistic culture where people may be concerned about themselves rather than collectivist cultures where conformity may be higher (BOND AND SMITH)
child of its time as a cultural change has taken place in the value placed on conformity
PERRIN AND SPENCER replicated the study with engineering students