Kuder–Richardson Formula 20

（重定向自Kuder）

In psychometrics, the Kuder–Richardson Formula 20 (KR-20) first published in 1937 is a measure of internal consistency reliability for measures with dichotomous choices. It is analogous to Cronbach's α, except Cronbach's α is also used for non-dichotomous (continuous) measures. It is often claimed that a high KR-20 coefficient (e.g., > 0.90) indicates a homogeneous test. However, like Cronbach's α, homogeneity (that is, unidimensionality) is actually an assumption, not a conclusion, of reliability coefficients. It is possible, for example, to have a high KR-20 with a multidimensional scale, especially with a large number of items.

词汇	Kuder
分类	英语词汇英语翻译词典
释义	Kuder 原声例句 Steve教你职业生涯规划 An unfortunate limitation of the Kuder is that it can't recommend careers that don't exist at the time of the test. Kuder 的一个不幸的限制是它不能推荐在测试时不存在的职业。英语百科 Kuder–Richardson Formula 20 （重定向自Kuder） In psychometrics, the Kuder–Richardson Formula 20 (KR-20) first published in 1937 is a measure of internal consistency reliability for measures with dichotomous choices. It is analogous to Cronbach's α, except Cronbach's α is also used for non-dichotomous (continuous) measures. It is often claimed that a high KR-20 coefficient (e.g., > 0.90) indicates a homogeneous test. However, like Cronbach's α, homogeneity (that is, unidimensionality) is actually an assumption, not a conclusion, of reliability coefficients. It is possible, for example, to have a high KR-20 with a multidimensional scale, especially with a large number of items.
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