Evolution of the Concept of Sensitivity and its Measurement: The Highly Sensitive Person Scale-Revised
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Sensitivity to environmental influences varies among individuals, with some more responsive to both negative and positive experiences. Individual differences in sensitivity are linked to psychological, physiological, and genetic factors and can be measured using the Highly Sensitive Person (HSP) scale. Over three decades, the conceptualization of sensitivity has shifted from a unidimensional to a multidimensional trait, necessitating a revision of the original scale. This study introduces and validates the revised HSP scale (HSP-R) using a UK and USA sample of 1,000 adults. Exploratory factor analysis on a calibration subsample (n = 600) yielded a 6-factor, 18-item structure, which was confirmed in a validation subsample (n = 400). The HSP-R measures six dimensions of sensitivity: Sensitivity to Details, Depth of Processing, Social Sensitivity, Sensitivity to Positive Experiences, Emotional Reactivity, and Overstimulation. It demonstrates robust psychometric properties, aligns with theoretical frameworks, and provides incremental validity beyond the Big Five traits.
