In a meta-analysis, the effect sizes of 20 primary studies are shown to be distributed heterogeneously. The following model is recommended to calculate the summary effect.
A) unweighted model
B) fixed-effect model
C) mixed model
D) random-effects model

Question

Quizplus · Accepted Answer

Since the effect sizes are distributed heterogeneously, a random-effects model is recommended. This model takes into consideration both within-study and between-study variability, allowing for a more accurate estimation of the summary effect.

In a Meta-Analysis, the Effect Sizes of 20 Primary Studies