A transport safety researcher has been investigating the effect of auditory lane-departure warnings (rumble strips) on a driving simulator to see if they can reduce the frequency of unintentional lane deviations by sleepy long-haul truck drivers.
She conducted an experiment using a sample of 10 truck drivers obtained via convenience sampling. For one 2-hour simulator session (Trial 1), participants drove a night route with the lane-departure warnings disabled, and the number of lane deviations was recorded. The following week (Trial 2), the same participants drove the same simulator route but with active auditory lane-departure warnings, and their deviations were recorded again. The data collected is presented below.
| Participant | Number of lane deviations during the 2-hour trial | |
|---|---|---|
| Without lane-departure warnings (Trial 1) | With lane-departure warnings (Trial 2) | |
| A | 18 | 12 |
| B | 9 | 10 |
| C | 24 | 15 |
| D | 15 | 8 |
| E | 11 | 9 |
| F | 5 | 2 |
| G | 13 | 13 |
| H | 28 | 19 |
| I | 7 | 8 |
| J | 22 | 14 |
Outline one advantage of having quantitative data in this study.
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.