An environmental psychologist investigated the effect of auditory environments on cognitive focus. The researcher chose to use a repeated measures design.
In one condition (the 'white noise' condition), participants completed a 5-minute spatial reasoning test while listening to flat white noise.
In a second condition (the 'nature sound' condition), the same participants completed a spatial reasoning test of equivalent difficulty while listening to green noise (rustling leaves and gentle rain).
In both conditions, the accuracy score (percentage of correct answers) achieved by each participant was recorded.
Explain why the researcher decided to use a repeated measures design, rather than an independent groups design, in this study.
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.