A test predicts performance for two different groups of applicants (e.g., men and women); however, the test predicts the performance significantly better for men than it does for women. This exemplifies:
single group validity occurs when the statistical prediction shows different validities for groups such that one group may have something different from zero statistical validity and the other has something different. This is seen in the above example with the men and women group. The statistical prediction for men holds better validity since its prediction is more statistically significant than the women group hence single group validity
