Conducted as planned? A detailed comparison of studies and their preregistered plans

The goal of this study is to investigate whether most of the deviations today still occur in the methodological aspects of sample size, exclusion criteria, and analysis, as in the study by Claesen and Gomes (2019). Claesen and Gomes (2019) examined published studies for deviations from their preregistrations. The study by Claesen and Gomes (2019) serves as the basis for this study, although deviations will be considered in more detail in this study. Across the various methodological aspects (hypothesis/research question, variables, sample size, exclusion criteria, analysis), the goal is to look at what changes were added, omitted, or modified from the preregistration to the published study. Another goal of this study is to be able to determine whether researchers are now better adhering to their preregistration and whether there are fewer deviations by comparing the study by Claesen and Gomes (2019) and this study. unknown other