what variable is used to test for residual heterogeneity what does iris represent in the metafor model what is the rma test used to test for what is the residual heterogeneity qe what is the main effect on iris in metafor what is iris model what is the main effect of rma what is the value of iris in metafor which of the following moderators is used to test for principal and interaction? what is residual heterogeneity of iris what is main effects of rma how to test for residual heterogeneity what is the test for residual heterogeneity what is rma used for in metafor what is the rma value does rma affect iris what is iris rma what variables can i test for residual heterogeneity in metafor what is rma rma is used in which metamodel variable