group size: Asch changed the amount of participants compared to confederates. He made the confederates outweigh the participants. Conformity increased because there were more people who were saying the right answer.
2. unanimity was were Asch made one confederate say a correct answer and another say an alternative wrong answer. Asch found that conformity decreased because there was less group pressure as others were getting seperate answers.
3. Task difficulty, Asch changed the length between the standard and comparison line. This made it harder to tell the difference between the lines, so conformity increased to those confederates around them.
strength: supporting studies from Lucas et al, he experimented by asking participants hard and easy maths questions. Lucas found that pp's were most likely to conform to their weakest point in maths when the questions were harder. This shows that task difficulty is a variable that affects conformity.
limitation: artificial experiment, therefore the participants may have played under demand characteristics. This then affects the results of the experiment and makes it not generalisable (as well as it only being experimented on American men only)