Dr. Kaelen conducted an experiment to investigate whether a high-stress auditory environment affects spatial working memory in pilots.
He asked participants to complete a computerised radar-tracking task (monitoring and logging the coordinates of multiple fast-moving aircraft) while high-volume emergency alarms played in the background.
The same participants were then asked to complete an equivalent radar-tracking task of equal difficulty, but with only normal ambient cockpit noise in the background.
Dr. Kaelen used a repeated measures design in his experiment.
Explain one strength and one weakness of using a repeated measures design in this study.
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