A cognitive psychologist conducted an independent measures experiment to investigate how different forms of verbal distraction affect driver performance. One group of participants completed a simulated driving test while engaging in a hands-free mobile phone conversation. A second, different group of participants completed the same driving test while engaging in an in-car conversation with a passenger. During the simulation, the psychologist recorded the number of distraction-related driving errors made by each participant (on a scale from 0 to 30, where higher scores represent poorer driving performance).
| Driving Simulator Error Scores (0–30) | |
|---|---|
| Hands-free Mobile Conversation | In-car Passenger Conversation |
| 18 | 12 |
| 22 | 15 |
| 19 | 11 |
| 25 | 14 |
| 17 | 10 |
| 21 | 13 |
| 23 | 16 |
| 16 | 9 |
| 20 | 11 |
| 24 | 14 |
| 19 | 12 |
| 21 | 8 |
Outline one conclusion that could be made about this study if p<0.05 p < 0.05\,p<0.05 appeared in the significance statement after conducting an appropriate statistical test.
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.