A sports psychologist was interested in the relationship between weekly mindfulness meditation practice and athletic endurance. She used a correlational design to investigate this in a self-selected sample of 35 amateur marathon runners.
Each participant provided their average weekly meditation time (in minutes) recorded via a verified mindfulness app. The runners' athletic endurance was then assessed using a standardized 12-minute Cooper run test on a track under controlled conditions, with the total distance covered (in meters) recorded.
Describe one strength of using a self-selected sample 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.