Naomi conducted a field experiment to investigate the effect of personal attire on compliance. Two different confederates—one wearing formal business attire and another wearing casual streetwear—approached visitors in a busy science museum to ask them to complete a 5-minute feedback survey. She recorded how many visitors agreed to fill out the survey or refused. Her findings are summarized in Table 1.
| Formal Business Attire | Casual Streetwear | |
|---|---|---|
| Number of visitors who agreed to complete the survey | 22 | 11 |
| Number of visitors who refused | 8 | 19 |
Explain one improvement that could be made to the experimental design used in Naomi's research.
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.