I need to find the correlation between the ratings given by two parties.
Let's say we have 2 coaches, namely A and B.
Coach A will rate the skills of the 12 players, either "Strong", "Moderate" or "Weak". Coach B will rate the same 12 players.
If Coach A rated all the players as "Strong", and Coach B rated 10 players as "Strong" and 2 players as "Weak".
I have tried putting the results into a contingency table form and ran Somers D test. However the Somers D shows 0% which does not truly representing the correlation of the ratings. What test could we carry out to find the correlation between the ratings of the coaches?