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Repeated measures (within-subjects) ANOVA

Repeated measures ANOVA in SPSS statstutor Community Project Ellen Marshall Reviewer: Alun Owen University of Sheffield University of Worcester stcp-marshall- ANOVA Repeated Repeated measures (within-subjects) ANOVA Dependent variable: Continuous (scale/interval/ratio), Independent variable: Categorical time/ condition (within subjects factor) Common Applications: Used when several measurements of the same dependent variable are taken at different time points or under different conditions. Repeated measures ANOVA analyses (1) changes in mean score over 3 or more time points or (2) differences in mean score under 3 or more conditions.

assumption is not met Normality of residuals by time point In the Save menu, ask for the standardised residuals. A set of residuals will be produced for each time point and added to the data set. Use histograms/ Shapiro-Wilk tests to check they are approximately normally distributed.

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