To Compute Partial $\eta$ ²,it Is Necessary to ______

Multiple Choice

To compute partial $\eta$ ²,it is necessary to ______.

A) partial out between-persons variability before computing proportion of variance
B) partial out within-persons variability before computing proportion of variance
C) partial out between-groups variability before computing proportion of variance
D) partial out within-groups variability before computing proportion of variance