| Summary: | 碩士 === 國立臺南大學 === 測驗統計研究所碩士班 === 99 === The purpose of this research is to study elementary and junior high school students’ personal belief in a just world (PBJW), justice belief at school, and justice belief in family. Background factors related to and inter-relationships among the three justice constructs and well-being were studied. In addition, the characteristics of item parameters of the three scales were explored. SEM (Structural Equation Modeling), multiple regression, and GPCM (Generalized Partial Credit Model) were employed to display the relationships among the three constructs, their correlations with the background variables, and characteristics of item parameters, respectively. In terms of results of this study, the reliabilities of the three scales are all above .80. The reliability looks fine and the convergence validity is well established. Among the three scales, the slopes and the difficulty thresholds of item parameters calibrated using GPCM range from 0.08 to 2.15 and from -1.56 to -0.22, respectively. The fact that all of item difficulty parameters are lower than 0 indicates that the subjects, on average, tend to respond to the items on the three scales with more positive attitude. The relationships among the three constructs and well-being are significantly positive. Different levels of grades and social economic statuses have shown significant differences in scores on the three scales. The only two significant background variables which provide unique contribution on accounting for the variances of the three scales are grade and social economic status.
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