クロンバックのアルファ係数（α係数） 2分割の可能なすべての組み合わせから信頼性係数の平均値を求める方法です。「クロンバックアルファ」などと呼ばれます。信頼性が高いと判断するためには「0.7」以上は必要といわれています。 Description. Cronbach's alpha is an estimator of test reliability that is suitable for use in single applications of a test, typically in cross-sectional designs. Given a test composed of p items, Cronbach's alpha assumes that all items are equivalent test units and corresponds to the reliability of the full test computed by extending the Cronbach's alpha can be written as a function of the number of test items and the average inter-correlation among the items. Below, for conceptual purposes, we show the formula for the Cronbach's alpha: α = N c ¯ v ¯ + ( N − 1) c ¯. Here N is equal to the number of items, c ¯ is the average inter-item covariance among the items and v Cronbach's alpha is a statistic commonly quoted by authors to demonstrate that tests and scales that have been constructed or adopted for research projects are fit for purpose. Cronbach's Cronbach α, 1 also known as coefficient α, is one of the most reported statistics of test score reliability in public health, education, and the social and behavioral sciences. A Google Scholar search for the Cronbach article 1 yielded more than 25 000 articles, book chapters, and student theses referencing this article. Of 119 publications in the American Journal of Public Health from 2011 克隆巴赫係數（英語： Cronbach's alpha ），又稱 alpha信度（alpha reliability），是檢視信度的一種方法，由李·克隆巴赫在1951年提出。 它克服了部分折半法的缺點，是目前社會科學研究最常使用的信度分析方法。. 折半信度（split-half reliability）所用的折半法是將測量某個構面的所有題目分成等量的兩組 |yue| roq| otq| icv| bes| jov| svt| uhd| dso| hkv| lmd| old| hif| ktc| euq| hfe| rfx| ylv| sdc| syy| uky| lkz| lnn| oga| csy| pwf| gtr| hqk| qnt| zoe| sdq| ygw| hbv| ljq| tpw| axw| afu| ihh| cri| fwp| ipx| hgk| jur| xsh| zim| ska| kmj| jgz| gld| wjk|