I'm having difficulty finding out what I can do with my data set. It comes from a french reading test that have 30 multiple choice questions.
For each of these questions:
- I have the facility value for the items on the test, wich is the percentage of right answers to the questions.
- I have the perception of the difficulty by the test takers, on a likert scale (Really easy, Easy, Medium, Hard, Really Hard).
Here is an example of what my data looks like:
I want to know if there is a correlation between the facility value and the perceived facility of the items... In other words, if the easy questions are perceived as easy ones. I don't really know what to do with the data... Should I convert the scores of the likert scale? Should I do a "mean" for each item?