or the intraclass correlation coefficient
Robinson's A: Robinson, W. S. The statistical measurement of agreement. American Sociological Review 22 (1957):17-25.
Intraclass Correlation: McNemar, Q. Psychological Statistics. Fourth edition. New York: Wiley 1969. p. 322
F-test: McNemar, Q. Psychological Statistics. Fourth edition. New York: Wiley 1969. p. 322