Psychometric properties of Korean Infant Sensory Profile 2

OBJECTIVES: This study aimed to evaluate test-retest reliability and convergent validity of the Korean Infant Sensory Profile 2 (K-ISP2) and explore whether the sensory processing of infants differs according to age, gender, and culture. MATERIALS AND METHODS: Participants were 140 Korean caregivers of infants aged 0–6 months. They completed the K-ISP2 and the Korean version of ‘What My Baby Is Like’ (K-WBL), a scale for measuring infant temperament, for convergent validity. The K-ISP2 was re-administrated for test-retest reliability with a mean interval of 16 days. RESULTS: The K-ISP2 showed good test-retest reliability (ICC = .84) and significant but weak convergent validity with the K-WBL (amenability/persistence, r = −.28, p < .001; adaptability, r = −.30, p < .001; reactivity, r = .24, p = .004; activity, r = .20, p = .02). There were no significant age and gender differences in the K-ISP2 total score. The K-ISP2 total score was similar to that of the Infant Sensory Profile 2 (ISP2). CONCLUSIONS: This study provides reliability and validity evidence of the K-ISP2. Normative data of K-ISP2 total score can be established regardless of age or gender. The ISP2 has showed similar psychometric properties for populations of both Korea and the United States. KEY MESSAGES: Sensory processing is a fundamental component for adaptive responses to environment and begins to develop before birth. The Korean Infant Sensory Profile 2 (K-ISP2) can be used to assess sensory processing patterns of Korean infants, with evidence of reliability and validity. Total scores of the K-ISP2 can be interpreted with one normative data set regardless of age and gender.