Andrich D, van Schoubroeck L
School of Education, Murdoch University, Australia.
Psychol Med. 1989 May;19(2):469-85. doi: 10.1017/s0033291700012502.
This study examines the Likert-style successive integer scoring of Goldberg's (1972, 1978) General Health Questionnaire (GHQ) with a psychometric model in which the thresholds between successive categories within each item can be estimated. The model is particularly appropriate because the scoring of the successive categories, which are not named in the same way across items, by successive integers has received substantial discussion in the literature. Results from 1967 teachers in Western Australia who completed the 30-item form of the GHQ show that the items conform reasonably well to the model at a general or macro-level of analysis. In particular, the original ordering of categories is supported. However, as expected, there are systematic differences between distances among threshold within items and systematic differences among thresholds between items. The differences between positively and negatively orientated items confirm a suggestion in the literature that these two classes of items form sufficiently different scales so that they could be treated as separate, though reasonably correlated, scales.
本研究使用一种心理测量模型来检验戈德堡（1972年、1978年）的一般健康问卷（GHQ）的李克特式连续整数评分，在该模型中可以估计每个项目内连续类别之间的阈值。该模型特别适用，因为文献中对连续类别（各项目中命名方式不同）采用连续整数评分进行了大量讨论。对西澳大利亚州1967名完成30项版本GHQ问卷的教师的研究结果表明，在总体或宏观分析层面，这些项目与该模型相当契合。特别是，类别的原始排序得到了支持。然而，正如预期的那样，各项目内阈值之间的距离存在系统差异，项目之间的阈值也存在系统差异。正向和负向项目之间的差异证实了文献中的一个观点，即这两类项目形成了足够不同的量表，因此可以将它们视为单独的量表，尽管它们之间存在合理的相关性。
