A health researcher wanted to investigate whether a new high-intensity interval training (HIIT) mobile application improves cardiovascular fitness more than a standard running application.
To recruit participants, the researcher stood outside a premium strength-and-conditioning CrossFit gym at 6:00 AM on a Tuesday morning and selected the first 30 gym-goers who agreed to participate.
All participants were asked to maintain their usual sleep and dietary habits for the 4-week duration of the study. At the end of the 4 weeks, all participants completed a standardised treadmill endurance test to measure their cardiovascular fitness level.
Identify the sampling method used in this study. Explain one limitation of using this sampling method in this investigation.
689 exam-style questions on AQA A Level Psychology Scientific processes. Each one has a worked solution and a mark scheme showing where the marks go.