# Correlation between two binary variables [duplicate]

Let's say I have some people that moved from country A to country B. Then I have a binary variable that indicates whether they read the news paper when they were in country A and one binary variable that indicates whether they read the news paper at the present, in country B. If I find that the correlation coefficient between the two variables is 0.368, how do I interpret this number? 2-tailed significance is 0.007. Is this number relevant?

## marked as duplicate by kjetil b halvorsen, mdewey, Ferdi, Peter Flom♦Oct 2 '18 at 11:19

• Cohen's $\kappa$ gives you the proportion of agreement corrected for chance agreement not the proportion of agreement. – mdewey Jul 9 '16 at 15:56