【摘要】 本文对教育和心理测验中的多种信度估计方法展开讨论,得到以下几个结论: 1.在估计测验的同质性信度方面,α系数较优,先前几种估计公式或者是其等价形式,或者是其在某种情况下的一个特例;2.在估计测验的信度系数D（T）/D（X）方面,β公式比α系数更优;最后提出估计信度系数的另一个新公式β₁并讨论它和β公式的关系。更多还原

【Abstract】 In educational and psychological tests, there are many methods forestimating reliability based on a single test such as: splithalf correctionformula, Rulon’s formula, Flanagan’s formula, K-R₂₀ formula, Hoyt’sformula, coefficient α and formula β, and so on. Are there any relationsamong these formulas? Which is more superior? These are problems thatrefers to how to use and explain them correctly. These problems are stu-died in this papers and some results are obtained: 1. In estimating reliability of internal consistency, Coefficient α ismore superior, and other formulas of estimation are either its equivalentform or its special example in some cases; 2. In estimating reliability coefficient D（T）/D（X）, formula β is moresuperior to coefficient α; Finally, another new formula β₁, of estimating reliability coefficient isgiven and the relation of β and β₁ is discussed.更多还原