Optimal number of response categories in rating scales: reliability, validity, discriminating power, and respondent preferences
Optimal number of response categories in rating scales: reliability, validity, discriminating power, and respondent preferences
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DOI：
10.1016/s0001-6918(99)00050-5
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发表时间：
2000-03-01
影响因子：
1.8
通讯作者：
Colman, AM
中科院分区：
文献类型：
--
作者：
Preston, CC;Colman, AM
使用自填式问卷，149名受访者评价的服务元素与最近访问的商店或餐馆的规模，不同的只是在数量的响应类别（范围从2到11）和101点的规模，以不同的格式。在几个指标的可靠性，有效性和辨别力，两点，三点，四点量表表现相对较差，和指数显着较高的规模与更多的反应类别，高达约7。内部一致性没有显着差异的规模，但重测信度往往会减少规模超过10个响应类别。受访者对10分制的偏好最高，紧随其后的是7分制和9分制。研究和实践的影响进行了讨论。(C)2000 Elsevier Science B.V.保留所有权利。PsycINFO分类：2220。
Using a self-administered questionnaire, 149 respondents rated service elements associated with a recently visited store or restaurant on scales that differed only in the number of response categories (ranging from 2 to 11) and on a 101-point scale presented in a different format. On several indices of reliability, validity, and discriminating power, the two-point, three-point, and four-point scales performed relatively poorly, and indices were significantly higher for scales with more response categories, up to about 7. Internal consistency did not differ significantly between scales, but test-retest reliability tended to decrease for scales with more than 10 response categories. Respondent preferences were highest for the 10-point scale, closely followed by the seven-point and nine-point scales. Implications for research and practice are discussed. (C) 2000 Elsevier Science B.V. All rights reserved. PsycINFO classification: 2220.