A psychologist conducted a study investigating the impact of a five-minute guided meditation on student concentration. Participants completed a concentration task before and after the session, and their performance changes were recorded in Table 2.
| Performance Category | Improved concentration (+) | Worse concentration (-) | No change (0) |
|---|---|---|---|
| Number of students | 24 | 8 | 4 |
Use the data in Table 2 to calculate the value of S S\,S using the sign test. Explain how you calculated this figure.
Practise AQA A Level Psychology Inferential testing (A-level only) with exam-style questions for A Level Psychology. 123 questions, matched to the AQA A Level Psychology (7182) 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.
