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Impact of the number of response categories and anchor labels on coefficient alpha and test-retest reliability

机译：响应类别和锚标签的数量对系数α和重测信度的影响

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摘要

A total of 1,247 college students participated in this study on the effect of scale format on the reliability of Likert-type rating scales. The number of response categories ranged from 3 to 9. Anchor labels on the scales were provided for each response option or for the end points only. The results indicated that the scales with few response categories tended to result in lower reliability, especially lower test-retest reliability. The scales with all the response options clearly labeled were likely to yield higher test-retest reliability than those with only the end points labeled. Scale design that leads to consistent participant responses as indicated by test-retest reliability should be preferred.
机译：共有1,247位大学生参加了这项研究，研究了量表格式对Likert型评分量表的信度的影响。响应类别的数量从3到9。刻度上的锚标签是为每个响应选项或仅端点提供的。结果表明，响应类别少的量表倾向于导致较低的信度，尤其是较低的重测信度。与仅标出终点的标尺相比，标有所有响应选项的标尺可能会产生更高的重测信度。最好采用能引起参与者一致反应的量表设计，如重测信度。

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