Dr. Aris is a biopsychologist who wants to investigate whether sleep duration is linked to cognitive performance. Dr. Aris selected six participants from an outpatient clinic. Over one week, she recorded the average number of hours of sleep per night for each participant, and then assessed their performance using a standard spatial memory test (scored out of 20). Dr. Aris's results are shown in Table 1.
| Participant | Average hours of sleep per night | Score on spatial memory test (out of 20) |
|---|---|---|
| A | 5.5 | 11 |
| B | 7.0 | 15 |
| C | 8.0 | 18 |
| D | 6.0 | 12 |
| E | 7.5 | 16 |
| F | 5.0 | 9 |
State a fully operationalised directional (one-tailed) alternative hypothesis for Dr. Aris's study.
Practise Edexcel A Level Psychology Research methods and skills with exam-style questions for A Level Psychology. 657 questions covering Research methods and skills, matched to the Edexcel A Level Psychology (9PS0) 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.
