Abstract
The article presents findings from the validation of the Polish version of the Short Sensory Profile, 2nd edition (SSP-2-PL).A total of 1230 participants were recruited: 310 diagnosed with autism spectrum disorder (ASD), 264 with nonspectrum neurodevelopmental disorders, and 656 typically developing (TD). The reliability and validity of the questionnaire were estimated using several methods, including internal consistency, test-retest, and factor analysis.Exploratory factor analysis identified a unidimensional solution in both the TD and ASD groups. The structure of SSP-2 seems to be homogeneous; therefore, the findings support the validity of calculating the SSP-2 overall score. Cronbach alphas and intraclass correlation coefficients exceeded 0.90 for overall total in all study groups. The Social Communication Questionnaire total score correlated moderately with SSP-2 scores. A 1-way analysis of variance yielded statistically significant differences at P < .001 between groups on all scales/quadrants and the overall score. Our results indicate greater severity of sensory processing problems among children with ASD and non-ASD disorders than among TD peers. Among children with ASD, 85% experienced problems with sensory processing. Scores in SSP-2-PL were not affected by the children's age, gender, informant, and informant's level of education.To the best of our knowledge, this is the 1st study on non-English participants using a revised version of the SSP-2. The results confirm the prevalence of sensory processing problems among children with neurodevelopmental disorders, especially with ASD. SSP-2-PL has high reliability in terms of both internal consistency and stability of scores. The results suggest that SSP-2 overall score could be used for screening purposes, namely to identify sensory processing and behavioral problems combined into one factor. Further analyzes of the SSP-2 factor structure are needed to confirm the findings of the present study.