William Zhou 问答专帖

liuhaiming

周老师：请教关于信度效度方面的知识，信度我知道怎么做，可是结果不是在0-1之间，居然超过1或者为负数。不明白。此外效度在JMP如何实现，目前我没找到任何资料。求赐教。

liuhaiming

效度不是一两句可以解决的。我已经翻阅资料搞定了。就是这个信度的值为啥不在0到1之间。纳闷的很。

liuhaiming

周老师，有空回复下我，不然可以跟我指点下哪里可以找到。

liuhaiming

admin 发表于 2015-9-23 14:09
您好，1 从JMP帮助文件中发现以下内容,可见超过1是有可能的。
此外还可以选择”Standardized Alpha”看 ...

Mr willian zhou,thank you very much for your answer. the sentence you send me  "the coefficient can approach 1.0 if you have many highly correlated items " means the value of alpha less than 1.0. the coefficient of anything can't over 100%.  the second method still not the range of 0 to 1.0.  SO, I can't understand it until now.
anyway,thangks for your help!thanks!