Abstract
BACKGROUND: In people with intellectual disabilities, emotional development progresses more slowly or stagnates, which can result in challenging behaviours. The Scale of Emotional Development-Questionnaire was designed to chart people's own emotional development, providing insight into basic emotional needs and resilience, while reducing prejudice, enhancing self-awareness and improving emotional expression. METHODS: The questionnaire was completed by 134 participants with moderate to borderline intellectual disabilities. Reliability, validity, internal structure and item performance were analysed to identify areas for improvement. RESULTS: Preliminary analyses indicated the questionnaire captures key aspects of emotional development, with most items showing strong factor loadings (51.79%). However, multiple items may require refinement due to moderate loadings (30.00%), low loadings (18.21%), limited variance (3.93%) and negative-low correlations. CONCLUSION: The Scale of Emotional Development-Questionnaire is a promising self-report interview of emotional development, complementing the proxy perspective of the Scale of Emotional Development-Short. The findings highlight areas for improvement and the need for further research post-revision.