Cochran
Q
test
a nonparametric statistical procedure applied when each experimental unit (e.g., an individual participant) is observed under multiple conditions and the data can have only one of two outcomes (e.g., yes or no, pass or fail). The Q test is used to evaluate the equality of the outcomes under the different conditions. [William Gemmell Cochran (1909–1980), Scottish-born U.S. statistician]