Response to Rating Scales: A Theoretical Model and Its Application to the Number of Categories Problem
用贝塔分布构建了评分量表反应的理论模型，并用实证数据验证，然后研究了量表点数与项目数对复合评分估计误差的影响，给出了最优组合方案。
A stochastic model of response to rating scales, using the beta distribution, is developed and tested against empirical data. The effect of number of items by number of points on the sampling error of a composite scale value estimator is investigated and quantitatively formulated. An application of this formulation to arrive at optimal combinations of number of points and number of items is described.