Table 2.

False positive rates (%) for all three conditions (mean ± 1SD across sessions, except Subject 3 with only 2 sessions). Criterion use in the color-only condition typically falls nearest the most lenient criterion in the other two conditions (2 or more ‘unsure’).

Subject	Unsure (2 or more)	Detection Dim (3 or more)	Moderate (4 or more)	Unsure (2 or more)	Simultaneous Dim (3 or more)	Moderate (4 or more)	Color
1	28.6±2.7	12.8±2.3	1.36±1.22	21.9±3.3	5.7±2.2	0	13.9±2.4
2	9.6±2.6	1.2±1.1	0	5.3±5.0	0.3±0.6	0	7.6±2.1
3	4.1	0.6	0.6	5.1	0	0	4.2±4.1
4	14.2±3.2	2.9±1.9	0	10.4±4.0	0	0	14.2±5.6