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Description: In this OSF project, we provide additional materials for the following article: Humberg, S., Kuper, N., Rentzsch, K., Gerlach, T. M., Back, M. D., & Nestler, S. (in press). Investigating the effects of congruence between within-person associations: A comparison of two extensions of response surface analysis. Psychological Methods. The file "WPA-RSA_SOM.pdf" contains supplementary tables with results of the simulation study. The file "readme_adapt_code.txt" provides a step-by-step instruction for adapting the code of the 2-Step and/or MSEM approach to your own data, and illustrates how the code can be adapted to investigate alternative hypotheses beyond congruence effects. The folder "Code_Templates" contains an R code template for the 2-step approach and two versions of the Mplus input file for the MSEM approach (Appendix C of the paper; see the file "readme_adapt_code.txt" for guidance in adopting the templates). The folder "Illustrative_Example" contains the (2-step and MSEM) code used for the illustrative analysis with the diary data, and a resimulated data set that readers can use to run the code. Please see the file "00_readme.txt" for guidance through the provided files. The folder "Simulation_Code" contains the analysis code used to conduct the simulation study. .