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.
Practise Edexcel A Level Psychology Methods with exam-style questions for A Level Psychology. 638 questions, matched to the Edexcel A Level Psychology (9PS0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.