what are the weaknesses of Asch's study
(-) lab study: ecological validity could have been low, may not generalise
(-) lacks mundane realism, the task was trivial, can it apply to a real situation examining conformity (jury deliberation)
(-) demand characteristics: confederates weren't trained actors, maybe p's could tell
Failure to protect from harm - put under stress
Deception - p's believed all people were real p's and were told it was a visual perception task
(-) temporal validity: replication with engineering students, conformity decreased
(-) population validity: sample was all males and all students, yet it measured conformity in all people