Development and Validation of the SPSQ-26

Abstract: The aim of this article was to develop an abbreviated version of the Sensory Processing Sensitivity Questionnaire (SPSQ), that maintains a similar factorial structure to the original and demonstrates good psychometric properties. The Short Form of the SPSQ (SPSQ-SF) was developed using a split-sample validation design. Items were retained based on impact on internal consistency reliability, fit to the hierarchical structure of the original SPSQ, and information curves based on a Graded Response Model. Subsequently, the dimensionality and fit to the latent structure of the SPSQ were evaluated. Correlations with the original SPSQ, other measures of Sensory Processing Sensitivity, personality, and clinical outcomes were examined. The SPSQ-SF demonstrated a good fit and high correlation with the original SPSQ. Positive correlations were observed with subscales of the Adult Temperament Questionnaire and the Highly Sensitive Person Scale. Neuroticism and Openness showed strong associations with the negative and positive higher-order dimensions of the SPSQ-SF, respectively. The negative higher-order dimension and Emotional and Physiological Reactivity subscale exhibited significant relationships with physical and psychological distress. Thus, the SPSQ-SF demonstrated good convergent, discriminant, and concurrent validity. The SPSQ-SF offers a valid and reliable alternative to the original SPSQ, allowing for the collection of a large amount of information with fewer items.