Exploring Heterogeneity in Meta-Analysis using Random Forests
Test coefficients of a model
Extract proximity matrix for a MetaForest object.
Conduct a MetaForest analysis to explore heterogeneity in meta-analyti...
Returns a MetaForest ModelInfo list for use with caret
MetaForest prediction
Returns an rma ModelInfo list for use with caret
PartialDependence: Partial dependence plots
Plots cumulative MSE for a MetaForest object.
Preselect variables for MetaForest analysis
Extract variable names from mf_preselect object
Prints summary.MetaForest object.
Report formatted number
Simulates a meta-analytic dataset
Plots variable importance for a MetaForest object.
Plots weighted scatterplots for meta-analytic data. Can plot effect si...
Conduct random forests-based meta-analysis, obtain partial dependence plots for metaforest and classic meta-analyses, and cross-validate and tune metaforest- and classic meta-analyses in conjunction with the caret package. A requirement of classic meta-analysis is that the studies being aggregated are conceptually similar, and ideally, close replications. However, in many fields, there is substantial heterogeneity between studies on the same topic. Classic meta-analysis lacks the power to assess more than a handful of univariate moderators. MetaForest, by contrast, has substantial power to explore heterogeneity in meta-analysis. It can identify important moderators from a larger set of potential candidates (Van Lissa, 2020). This is an appealing quality, because many meta-analyses have small sample sizes. Moreover, MetaForest yields a measure of variable importance which can be used to identify important moderators, and offers partial prediction plots to explore the shape of the marginal relationship between moderators and effect size.