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Paper 1Approaches, Issues and Debates1 marks
A researcher is studying the impact of different amounts of sleep on cognitive performance.
Description
Study on Sleep and Performance
Participants are divided into three groups: one group sleeps for 4 hours, another for 6 hours, and the last for 8 hours. Their performance on a cognitive test is measured after each sleep duration.
| Sleep Duration (hours) | Cognitive Test Score |
|---|---|
| 4 | 75 |
| 6 | 85 |
| 8 | 95 |
- a[1]
Define the independent variable in this study.
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