The aim of the study was to identify items eligible for SR-measurement within the (G)EDI domains "social competence" and "emotional maturity" by a theory-based selection process, and therefrom develop a GEDI-SR scale and assess its dimensions, psychometric properties and validity. We identified 20 original (G)EDI items eligible for measuring SR. Starting with these 20 items, we used exploratory factor analysis to assess constructs and dimensions using the development dataset.