A cognitive psychologist investigated the effect of different mnemonic techniques on short-term memory recall. Group A was trained to use a "chunking" strategy, while Group B was instructed to use "rote rehearsal" to memorise a list of 30 unrelated nouns. Both groups were given 5 minutes to study the list before completing a free-recall test. The table below shows the number of nouns correctly recalled by each participant.
| Group A (Chunking) | Words Recalled | Group B (Rote Rehearsal) | Words Recalled |
|---|---|---|---|
| Participant 1 | 19 | Participant 1 | 12 |
| Participant 2 | 24 | Participant 2 | 15 |
| Participant 3 | 15 | Participant 3 | 11 |
| Participant 4 | 21 | Participant 4 | 14 |
| Participant 5 | 26 | Participant 5 | 16 |
| Participant 6 | 22 | Participant 6 | 13 |
| Participant 7 | 17 | Participant 7 | 15 |
| Participant 8 | 24 | Participant 8 | 12 |
Which of these is the mean score of the participants in Group A (Chunking)?
13.513.513.5
21.521.521.5
212121
242424
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.