Lin's concordance correlation coefficient (CCC) which is used to quantify the extent of agreement between two measures ranges between [-1,1]. I want to know under what condition does perfect discordance ($CCC=-1$) hold true? Based on my thinking and reasoning, I had few doubts which I would like to clarify:

  1. Is this only possible when means of two variables equals 0, variances of two variables is identical and $PCC=-1$?

  2. Is there any other possibility when $CCC=-1$ apart from 1.?


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.