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The standardization of Korean Bayley Scales of Infant Development (K-BSID-II): A Pilot Study

Abstract

As the preliminary study for the development of the test material for Korean Bayley Scales of Infant Development-II, 186 infants from Seoul and its vicinities, middle-, south regions of Korea were tested with the pilot version of K-BSID-II. The pilot test included ten extra items in addition to translated BSID-II items. Korean infants showed a slightly lower Mental Developmental Index (M=96.9, SD=10.9) on BSID-II than American counterparts but the Psychomotor Developmental Index(M=100.4, SD=13.4) was very similar to that of the US norm sample. There was high reliability of BSID-II Behavior Rating Scale in all age groups(.97-.98). The correlation between the MDI and PDI was moderate (.52). There were high inter-scorer reliabilities for MDI, PDI and BRS. Item difficulty analyses suggested rearrangements of items and the addition of test items from other age groups for some age groups for the standardization study. The results provided basic materials for the standardization study of Korean BSID-II.

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