A clinical psychologist investigated the daily severity of obsessive-compulsive symptoms in a group of 10 individuals diagnosed with Obsessive-Compulsive Disorder (OCD). Each participant rated their average daily distress level related to intrusive thoughts over a fortnight on a scale from 1 (minimal distress) to 15 (extreme distress).
The results for the patients are presented in Table 1.
Calculate the measures of central tendency for the data in Table 1 and complete the table with your answers.
Table 1: Daily distress ratings for patients with OCD
| Participant | Daily distress rating |
|---|---|
| Patient 1 | 11 |
| Patient 2 | 7 |
| Patient 3 | 12 |
| Patient 4 | 8 |
| Patient 5 | 11 |
| Patient 6 | 14 |
| Patient 7 | 6 |
| Patient 8 | 11 |
| Patient 9 | 9 |
| Patient 10 | 5 |
| Mean score | |
| Median score | |
| Mode score |
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.
