Table 1.

The 12 stages of difficulty of the 5CSRTT. The length of the visual cue (‘Light On’) and the additional response window (LH, limited hold) decreases through the stages. Criteria to advance to each stage are provided in the last row.

Stage	1	2	3	4	5	6	7	8	9	10	11	12
Light On (s)	30	20	10	5	2.5	1.25	1	0.9	0.8	0.7	0.6	0.5
LH (s)	30	20	10	5	5
Criteria to reach the stage	-	≥ 30 correct answers	≥ 50 correct answers	≥ 50 correct answers > 80% accuracy	≥ 50 correct answers > 80% accuracy < 20% omissions