In Meta-Analyses, Which of the Following Examples Would Be Considered

Multiple Choice

In meta-analyses, which of the following examples would be considered methodological moderators? (circle all that apply)

A) whether the dependent variable was self-reported or via observational measure
B) whether the independent variable was operationalized differently across studies
C) whether socio-economic status influenced the relationship between A and B
D) whether the obtained relationship between A and B was causal or correlational