meta-analysis

Recalculating Effect Sizes for Luo et al. 2020

This post walks you through the reanalysis of a meta-analysis with extremely large effect sizes.

How to set up the 3-level structure for meta-analyses

How to set up the three-level structure for meta-analyses using the R package metafor.

A very short primer on standardized mean differences for meta-analyses

A very short primer on the d-family and pretest-posttest-control (PPC) designs for calculating standardized mean differences.

A very short primer on multi-level meta-analyses

This post walks you through the problem of effect size dependency and provides a solution with R code.

(Multi-) Leveling Up: Part I

This post adds multilevel modelling to two recent meta-analyses on the efficacy of apps for the treatment of depression.

The conundrum of twin-singleton differences in intelligence - A centenary (1924-2018), preregistered meta-analysis

Slides for my talk on twin-singleton differences in intelligence at the symposium for Meta-analyses, meta-meta-analyses, and meta-research in individual differences research (DPPD2019)

Symposium for Meta-analyses, meta-meta-analyses, and meta-research in individual differences research (DPPD 2019)

Description of our talks for the symposium on Meta-analyses, meta-meta-analyses, and meta-research in individual differences research at the DPPD 2019

Workshop: A Practical Guide for Meta-Analyses in R

This blogpost is an adaption from my 90 minute workshop on all basic steps in conducting a meta-analysis in R.