Sphericity refers to the assumption that the relationship between pairs of experimental conditions is similar, but how many trials are required for sphericity to become an issue?
A) 2
B) 3
C) 4
D) 5

Question

Quizplus · Accepted Answer

Sphericity becomes an issue when there are three or more experimental conditions. With two conditions, the assumption of sphericity always holds true, and with three or more conditions, it may or may not be true. Therefore, the minimum number of trials required for sphericity to become an issue is three.

Sphericity Refers to the Assumption That the Relationship Between Pairs