Consider the following scenario. I ran an experiment with 200 trials, each with a different stimulus. Each subject did exactly 200 trials. The subject responds with a single number anywhere between 5 and 50. The correct answer also ranges between 5 - 50. For each subject that did the experiment, I compute a single value, $V$, for that person. This value $V$ uses computations that use the expected answer and the observed answer for each trial. That is all the experiment does. It allows me to find $V$ for a subject.
I was asked to find Cronbach's alpha for this particular experiment. How do I do it? I see the formula on Wikipedia, however the denominator is $K-1$ and in my case, $K=1$, so how would I find Cronbach's Alpha? Should I find a single Cronbach's alpha value for the experiment as a whole, or is each subject getting an alpha value? I couldn't find many good online resources to learn about Cronbach's alpha value, so if anyone has any good suggestions, I would love to see links to places I can learn this stuff. Thanks!
I will be using R, and I have a CSV file where column 1 is the subject, column 2 is the expected answer, and column 3 is the subjects answer. There are 200 rows.