Meta-analysis output differs in Jasp compared to metafor (R)
Does anyone know why JASP and R have given me different output for the same meta-analysis?
For context, I attempted a meta-regression in Jasp after completing it in R using the metafor package. I uploaded my file to JASP after calculating effect size using the escalc function in metafor and then I plugged in the ES (yi) and SE (vi) values into the model.
The meta-regression coefficients seem similar, so I am not too worried about this. However, the heterogeneity estimates differ more substantially. Here are some examples:
I^2 in R: 36.82%; I^2 in JASP: 97.052%
Tau squared in R: 0.036; Tau squared in JASP: 0.097
H^2 in R: 1.58; H^2 in JASP: 33.927
I've been trying to find some more information about this online, but I can't seem to get anywhere. Can someone explain these differences? Since JASP is built using the metafor package, I assumed these would be the same.
Thank you in advance for your insights!