Abstract
The purpose of this study was to develop and validate of water safety awareness scale for elementary school students using Rasch rating scale model. Establishing content and face validity, 30-item and 4-point rating scale were generated. The scale was administered to 516 elementary school students. The Rasch measurement computer program, WINSTEPS was used to analyze the data. Model fit was decided by Infit and Outfit index (≥.60 and ≤1.40). The results provided that the four-point rating scale was appropriated that the conditional probability curve and the step calibration index increased step by step (-.80〈-.12〈.92). The 8-item of the 30 items were selected as the DIF between gender, and the one item had over standard item fit (infit=1.18, outfit=1.41). The results indicated that 21 items were finally selected as the water safety awareness scale for elementary school students. To calibrate the evidence of validity, structural aspect of validity and the generalizability aspect of validity were utilized. The scale was verified unidimensionality using Rasch principal component analysis. The person & item reliability index (≥.80) and the person & item separation index (≥2.00) were functioned well and person & item strata index showed different step index. This study developed the water safety awareness scale for elementary school students that constructed 21-item and 4-point rating scale. In addition, the newly constructed this scale for elementary school students should be validated to increase external validity.
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