A researcher studies speed of thinking in 30 adults with clinical depression and 30 adults of similar ages without depression. Each person rates how quickly they think, from 1 (very slowly) to 5 (very quickly). Each person also completes a standardised timed task that measures speed of thinking. A longer time means slower thinking.
| Group | Mean self-rating (1 to 5) | Mean time on the timed task (seconds) |
|---|---|---|
| With clinical depression | 3.1 | 74 |
| Without clinical depression | 3.3 | 51 |
Explain why the timed task may give stronger evidence than the self-ratings about speed of thinking in clinical depression. Use the data in the table.
38 exam-style questions on OCR GCSE Psychology 3.3 Application: The development of treatments, covering 3.3.1 Anti-psychotics and anti-depressants, 3.3.2 Psychotherapy, and 3.3.3 Neuropsychology for study. Each one has a worked solution and a mark scheme showing where the marks go.