Wright B D, Linacre J M
MESA Psychometric Laboratory, University of Chicago, IL 60637.
Arch Phys Med Rehabil. 1989 Nov;70(12):857-60.
Quantitative observations are based on counting observed events or levels of performance. Meaningful measurement is based on the arithmetical properties of interval scales. The Rasch measurement model provides the necessary and sufficient means to transform ordinal counts into linear measures. Imperfect unidimensionality and other threats to linear measurement can be assessed by means of fit statistics. The Rasch model is being successfully applied to rating scales.
定量观察基于对观察到的事件或表现水平进行计数。有意义的测量基于区间量表的算术特性。拉施测量模型提供了将顺序计数转换为线性测量的必要且充分的方法。不完美的单维性和其他对线性测量的威胁可以通过拟合统计量进行评估。拉施模型正在成功应用于评定量表。
