Which model(s) generally requires the assumption of sphericity?
A) One-factor repeated design.
B) Two-factor split plot design.
C) Three-factor design with two between-subjects factors and one within- subjects factor.
D) All of the above.
E) None of the above.

Question

Quizplus · Accepted Answer

Sphericity is an assumption required in repeated measures ANOVA, which applies to designs where the same subjects are measured multiple times under different conditions. This includes one-factor repeated designs, two-factor split plot designs (where one factor is a repeated measure), and three-factor designs with a mix of between- and within-subjects factors, as long as there's at least one within-subjects factor (repeated measures component).

Which Model(s) Generally Requires the Assumption of Sphericity