测量某个领域的知识，有8道题目，其中答案有正确和错误两种选项，我在某个研究中看到他也采用了这种类似的题目，但是标注了阿尔法值，不知道他是怎么算出来的？另外附上这篇文献：

为了衡量知识水平，我们平均回答了10个关于政治的多项选择题和开放式问题（编码为1表示正确，0表示错误，“不知道”或缺失；α= 0.72）。

Political ideology was measuredand codedexactly as in the MTurk study. To measureknowledge, we averaged the responsesto 10 multiple-choice and open-ended questions about politics (coded 1forcorrect and 0 for incorrect, “don’t know,” or missing; α= .72).

Miller, J. M., Saunders, K. L., & Farhart, C. E. (2016). Conspiracyendorsement as motivated reasoning: The moderating roles of political knowledgeand trust. American Journal of Political Science, 60(4), 824-844.

感谢！