b’‘: Grier [1] nonparametric measure of response bias
See also
[1] Grier, J. B. (1971). Nonparametric indexes for sensitivity and bias: Computing formulas. Psychological Bulletin, 75, 424-429.
Calculates metric based on hit, miss, correct rejection, and false alarm counts
Calculates metric based on hit rate and false alarm rate
based on the number of args and the availability of .prob routes call to appropriate method.