One of the important issues emphasized within the scope of positive psychology is the concept of flourishing. Flourishing, whose relationship with many different variables has been demonstrated in the literature, is also frequently used in psychology and educational sciences research. Based on these reasons, it is considered important to examine the structure of flourishing and the psychometric properties of the scales measuring this structure. The aim of this study is to determine the psychometric properties of the short form of flourishing scale within the scope of the Rasch model and to reveal whether differential item function according to the gender variable. The study group of the research consists of 576 university students studying at a public university in Istanbul. The Short Form of the Flourishing Scale, which is widely used in social sciences and consists of eight items and a single dimension, was used as a data collection tool. The analysis of the data obtained was made according to the Rasch Partial Credit Model. First of all, the assumptions of the Rasch model, namely unidimensionality and local independence, were tested. It was later revealed that all items were compatible with the model. In addition, it was found that the seven-point scale used in the scale worked effectively and the observed and expected values in the item characteristic curves overlapped. Finally, according to the Likelihood Ratio results, the fourth item showed non-uniform, the sixth and eighth items showed uniform negligible Differential Item Functioning. The scale was evaluated within the scope of the Rasch model, and the relevant scale can be evaluated within the scope of Generalizability Theory in different studies.

Flourishing, Rasch, Partial Credit Model, Differential Item Functioning