Assumptions Underlying the One-Way ANOVA with One Repeated-Measures Factor
Assumptions for the Multivariate Test
Level of measurement. Repeated measures designs are so named because they normally involve obtaining repeated measures on some criterion variable from a single sample of participants. This criterion variable should be assessed on an interval- or ratio-level of measurement. The predictor variable should be a nominal-level variable (a categorical variable) that typically codes “time,” “trial,” “treatment,” or some similar construct.
Independent observations. A given participant’s score in any one condition should not be affected by any other participant’s score in any of the study’s conditions. However, it is acceptable for a given ...
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