Sherif Studied the Impact of Social Norms on Perception Using

Sherif studied the impact of social norms on perception using the autokinetic phenomenon and found that

A) a person's judgments of light movements were influenced BY reports of other participants.
B) the light seemed to fade away after several minutes of viewing time.
C) participants' reports were unaffected by social norms.
D) although social norms produce changes in behavior in normal settings, the principle does not extend to perception.