A health psychologist was interested in the relationship between individuals' average nightly sleep duration and their self-reported daily stress levels. She used a correlational analysis to investigate this in a volunteer sample of 40 undergraduate students.
Each participant's sleep duration was monitored using a wearable sleep tracker over a one-week period to calculate a mean nightly sleep duration (in hours). Daily stress levels were assessed using a validated 10-item questionnaire, producing a score from 10 (low stress) to 50 (high stress).
The psychologist's hypothesis predicted a significant negative correlation.
Using the information above, explain what she was expecting the results to show.
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.