Table 2.

Nonparametric sensitivity (A’) and bias (B”) values calculated from average hit and false alarm data for Exps. 1 & 2. A’ maximum is 1.0. For B”, zero indicates no bias.

		Sensitivity (A')		Bias (B")
		Before Correction	After Correction	Before Correction	After Correction
Exp. 1	2% Prevalence	0.90	0.91	0.65	0.60
	50% Prevalence	0.92	0.92	0.36	0.31
Exp. 2	2% Prevalence	0.88	0.91	0.75	0.56
	50% Prevalence	0.90	0.91	0.30	0.18