An educational psychologist conducted an experiment to investigate the effect of background music on reading comprehension. One group of participants read a short text and completed a comprehension test in a quiet room, while another group did the same in a room with pop music playing in the background.
| Quiet Room (No Music) | Music Room (Pop Music) | ||
|---|---|---|---|
| Participant | Score | Participant | Score |
| Participant A | 18 | Participant G | 12 |
| Participant B | 19 | Participant H | 15 |
| Participant C | 15 | Participant I | 10 |
| Participant D | 20 | Participant J | 14 |
| Participant E | 17 | Participant K | 11 |
| Participant F | 16 | Participant L | 13 |
Which of these would be an extraneous variable in this study?
Music condition
Hearing ability
Height
Eye colour
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.