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首页> 外文期刊>Health Education Research >Evaluating the properties of a stage-specific self-efficacy scale for physical activity using classical test theory, confirmatory factor analysis and item response modeling
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Evaluating the properties of a stage-specific self-efficacy scale for physical activity using classical test theory, confirmatory factor analysis and item response modeling

机译：使用经典测试理论，验证性因素分析和项目响应模型评估特定阶段的体育锻炼自我效能量表的属性

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摘要

The purpose of this paper was to evaluate the psychometric properties of a stage-specific self-efficacy scale for physical activity with classical test theory (CTT), confirmatory factor analysis (CFA) and item response modeling (IRM). Women who enrolled in the Women On The Move study completed a 20-item stage-specific self-efficacy scale developed for this study [n = 226, 51.1% African-American and 48.9% Hispanic women, mean age = 49.2 (±7.0) years, mean body mass index = 29.7 (±6.4)]. Three analyses were conducted: (i) a CTT item analysis, (ii) a CFA to validate the factor structure and (iii) an IRM analysis. The CTT item analysis and the CFA results showed that the scale had high internal consistency (ranging from 0.76 to 0.93) and a strong factor structure. Results also showed that the scale could be improved by modifying or eliminating some of the existing items without significantly altering the content of the scale. The IRM results also showed that the scale had few items that targeted high self-efficacy and the stage-specific assumption underlying the scale was rejected. In addition, the IRM analyses found that the five-point response format functioned more like a four-point response format. Overall, employing multiple methods to assess the psychometric properties of the stage-specific self-efficacy scale demonstrated the complimentary nature of these methods and it highlighted the strengths and weaknesses of this scale.
机译：本文的目的是使用经典测试理论（CTT），验证性因子分析（CFA）和项目反应模型（IRM）来评估针对特定阶段身体活动的自我效能量表的心理计量学特性。参加“移动女性”研究的女性完成了针对该研究开发的20个阶段特定的自我效能感量表[n = 226，51.1％的非洲裔美国人和48.9％的西班牙裔女性，平均年龄= 49.2（±7.0）年，平均体重指数= 29.7（±6.4）]。进行了三项分析：（i）CTT项目分析，（ii）CFA以验证因素结构，以及（iii）IRM分析。 CTT项目分析和CFA结果表明，该量表具有很高的内部一致性（范围从0.76到0.93），并且具有很强的因子结构。结果还表明，可以通过修改或消除一些现有项目来改善规模，而不会明显改变规模的内容。 IRM结果还表明，该量表中很少有针对自我效能感较高的项目，并且该量表所依据的特定阶段假设被拒绝了。此外，IRM分析发现，五点响应格式的功能更像四点响应格式。总体而言，采用多种方法评估特定阶段自我效能感量表的心理计量学特性证明了这些方法的互补性，并突显了该量表的优缺点。

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  • 来源
    《Health Education Research》 |2006年第1期|i33-i46|共14页
  • 作者

    Louise C. Mâsse; Kristiann C. Heesch; Karen E. Eason; and Mark Wilson;

  • 作者单位

    Centre for Community Child Health Research Department of Pediatrics University of British Columbia L408-4480 Oak Street Vancouver British Columbia V6H 3V4 Canada;

    School of Human Movement Studies University of Queensland Brisbane Queensland 4972 Australia;

    Center for Health Promotion and Prevention Research University of Texas Health Science Center at Houston Houston TX 77030 USA;

    Graduate School of Education University of California Berkeley Berkeley CA 94720 USA;

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