Advanced Communication Research Methods
Sphericity is a statistical assumption that refers to the equality of variances of the differences between all possible pairs of conditions in a repeated measures design. It plays a crucial role in the analysis of variance (ANOVA) when using repeated measures, as violations of this assumption can lead to incorrect conclusions about the data. When sphericity holds, it ensures that the results of statistical tests are valid, providing reliable insights into the effects of independent variables across multiple conditions.
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