Construction and Standardization of a Statistical Self-Efficacy Scale among Graduate Students (SSE-GS) Using Thurstone’s Method of Equal-Appearing Intervals
DOI:
https://doi.org/10.53285/artsep.v8i2.3171Keywords:
Statistical self-efficacy, scale development, Thurstone method, psychometricsAbstract
This study aimed to construct and validate a Statistical Self-Efficacy Scale for Graduate Students (SSE-GS) based on Thurstone’s Equal-Appearing Interval Method, examine its psychometric properties, and determine the level of statistical self-efficacy among graduate students. The initial version of the scale consisted of 60 items, which were reviewed by a panel of experts to ensure clarity and appropriateness of wording, resulting in the elimination of 13 items. Subsequently, 47 items were presented to 30 expert judges, who classified each item into 11 ordered categories ranging from most favorable to most unfavorable along a continuum of statistical self-efficacy; based on their responses, scale values (medians) and interquartile ranges were computed, and 35 items were selected and distributed approximately evenly along the continuum. The final form of the scale was administered to a sample of 294 graduate students to evaluate its validity and reliability, and the results demonstrated strong factorial validity and high internal consistency, with a Cronbach’s alpha coefficient of 0.89. Exploratory factor analysis revealed four dimensions—self-efficacy in statistical planning, conducting statistical analysis, interpreting statistical results, and research decision-making—and the findings indicated that the overall level of statistical self-efficacy among graduate students was moderateReferences
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