In an experiment investigating the impact of social support on resistance to conformity, the researchers used an independent groups design, meaning different participants took part in each condition. This means individual differences (participant variables) could have acted as a confounding variable and affected the validity of her results.
Outline one way in which the researchers could have addressed this issue.
689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.