Öz
Scale development, which is one of the most preferred study types in the field of social sciences. This type of study can cause serious problems when it is done by inexperienced and incompetent researchers. The inadequacies of the researchers in statistical analysis reveal that they need a guide in the scale development process. Within the scope of this study, the application steps of all statistical analyzes needed while developing a scale are explained and exemplified with the help of the open source and free Jamovi program. Developed with the R programming language, the Jamovi program is similar to the SPSS program, which is the most preferred program in social sciences research. It stands out from other free statistical programs with its user-friendly interface and high-level analysis capacity. With Jamovi, all analyzes can be done quickly with the help of menus without the need for coding skills. In addition, it provides a lot of convenience to the user with the simultaneous display of the data window and the output window. In this study, all the analyzes required for the scale development study were presented with the help of the Jamovi program. In this context, the preparation of the data for analysis, item analysis, explanatory and confirmatory factor analyzes to reveal the construct validity and reliability analyzes are explained. In the section of data preparation for analysis, the basic elements of the Jamovi program (windows, basic menus, data transfer, defining variables, transforming variables, etc.) are introduced. In the other sections, all the analyzes mentioned are shown on the sample data set. Comments on the analysis results of the sample data are also included. The points to be considered in reporting the results obtained according to the APA format and the tabular form of the results are presented to the reader. With the help of this guide, researchers will be able to master all the stages they will need in scale development studies. The Jamovi program, which emerged as an alternative to the SPSS program, is also recommended to be used for multivariate analyzes such as Structural Equation Modeling, Mediation Effect, Factorial Variance Analysis.