A clinical psychologist investigated symptom patterns in patients undergoing an intensive exposure and response prevention (ERP) program for Obsessive-Compulsive Disorder (OCD). For one week, a group of 8 patients recorded their daily hours of structured therapeutic sleep and their daily frequency of intrusive thoughts. The mean scores for each clinical measure were calculated.
| Patient | Daily Hours of Structured Therapeutic Sleep | Daily Frequency of Intrusive Thoughts |
|---|---|---|
| Patient A | 7 | 45 |
| Patient B | 8 | 2 |
| Patient C | 7 | 82 |
| Patient D | 6 | 11 |
| Patient E | 8 | 54 |
| Patient F | 7 | 95 |
| Patient G | 6 | 0 |
| Patient H | 9 | 31 |
| Mean | 7.25 | 40.0 |
State how the standard deviation for daily hours of structured therapeutic sleep would differ from the standard deviation for daily frequency of intrusive thoughts.
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.
