The repeated measures design (also known as a within-subjects design) uses the same subjects with every condition of the research, including the control. For instance, repeated measures are collected in a longitudinal study in which change over time is assessed. Other studies compare the same measure under two or more different conditions. For instance, to test the effects of caffeine on cognitive function, a subject's math ability might be tested once after they consume caffeine and another time when they consume a placebo.
Read more about Repeated Measures Design: Crossover Studies, Uses of A Repeated Measures Design, Order Effects, Counter Balancing, Repeated Measures ANOVA
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“Nothing in the nature around us is evil. This needs to be repeated since one of the human ways of talking oneself into inhuman acts is to cite the supposed cruelty of nature.”
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