Becker G
Department of Psychology, University of Winnipeg, Manitoba, Canada.
Psychol Rep. 2001 Oct;89(2):291-307. doi: 10.2466/pr0.2001.89.2.291.
Violation of either of two basic assumptions in classical test theory may lead to biased estimates of reliability. Violation of the assumption of essential tau-equivalence may produce underestimates, and the presence of correlated errors among measurement units may result in overestimates. The ubiquity of circumstances in which this problem may occur is not fully comprehended by many workers. This article surveys a variety of settings in which biased reliability estimates may be found in an effort to increase awareness of the prevalence of the problem.
违反经典测试理论中的两个基本假设中的任何一个，都可能导致对信度的估计出现偏差。违反基本tau等价性假设可能会产生低估，而测量单元之间存在相关误差可能会导致高估。许多研究人员并未充分理解这个问题可能出现的普遍情况。本文调查了各种可能出现有偏差信度估计的情况，以提高对该问题普遍性的认识。
