On a 16 marker, usually it's an outline and evaluate. Outline is 6 marks and evaluate is 10 marks which means you need to be putting much more detail and time into the evaluation side and not get bogged down in the outline.
I don't know how you have been taught, but my college has taught me to structure my evaluations as Point, Evidence, Therefore (P.E.T).
So, if i was asked to outline and evaluate variations affecting conformity my answer may go something like this:
Point: A limitation of Ash's variations is that the sample of Asch's study is said to be unrepresentative
Evidence: This is because only American students who were men were tested on by Asch. Other research has suggested that women may conform more and this may be due to their concern for social relationships and being accepted is higher than it is for males.
Therefore: This is a limitation because it means Asch's findings may only apply to American males as he did not take into account gender differences, therefore we cannot generalize the results to both genders.
And you would do this for about 4 evaluation points - suggested 2 strengths and 2 weaknesses.
I hope this helps x