Dear Professor Cheung,
I am writing this post to seek your help regarding the OSMASEM. Building a model with no moderator works just fine, but adding a moderator to the model does not work properly. I am currently learning the OSMASEM approach by replicating one of the published articles that applied the approach, entitled “Simple View of Reading in Chinese: A One-Stage Meta-Analytic Structural Equation Modeling” written by Peng and his colleagues (https://journals.sagepub.com/doi/abs/10.3102/0034654320964198). Thanks to their open data (Appendix C), I was able to construct a dataset and to replicate their first model with no moderator by computing the same coefficients and p-values in accordance with the figure in the article. However, when I add a moderator, the results are unstable—seemingly inaccurate (very large) standard errors. It would be appreciated if you could kindly review my codes.
Thank you in advance.