Table 3.

Training progression criteria.

Phase	Holes in Negative Lid	Sensitivity Required to Advance	Specificity Required to Advance	Minimum # Sessions Required to Advance	# COVID-19 (+) Samples/Session	# COVID-19 (-) Samples/Session
Imprinting	1	9/10 trials overall correct		1	1	1
Phase 1	1	80% (5/6 correct)	80% (10/12 correct)	3 in a row	2	4
Phase 2	4	80% (5/6 correct)	80% (10/12 correct)	3 in a row	2	4
Phase 3	16	80% (5/6 correct)	80% (10/12 correct)	3 in a row	2	4
Phase 4	Fully open	80% (5/6 correct)	80% (10/12 correct)	3 in a row	2	4
Sensitivity = TP/(TP + FN)                   Rate of alert to positive samples Specificity = TN/(FP + TN)           Rate of no alert to negative/blank samples