I have a data of:
30 medical students who have rated visibility of 40 brain anatomical structures (each structure has been rated on a Likert scale of 1-5, where 1 corresponds to "not visible" and 5- "clearly visible").
The research question is two-fold:
What is the overall concordance between the students in identifying these structures (which is measured on the 1-5 ratings ordinal scale)? Is there any statistically significance difference in between their ratings?
Is year of medical school study associated with rating?