A researcher administered four different self-report scales measuring state anxiety to a group of participants on two separate occasions, one week apart, to assess test-retest reliability.
| Scale | Mean from Test 1 | Mean from Test 2 |
|---|---|---|
| Scale P | 45.2 | 44.8 |
| Scale Q | 12.8 | 18.2 |
| Scale R | 78.5 | 71.1 |
| Scale S | 15.3 | 55.6 |
Using the data in Table 1, which scale has the highest level of external reliability?
Scale P
Scale Q
Scale R
Scale S
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.