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. 2020 Jun 26;6(1):e12043. doi: 10.1002/trc2.12043

TABLE 3.

Amount of time spent on instruction screen, and time taken to complete each cognitive test

Overall (n = 1594) 40 to 49 years (n = 321) 50 to 59 years (n = 745) 60 to 70 years (n = 528)
Mean (SD) Mean (SD) Mean (SD) Mean (SD) P1 P2
Time spent on instruction screen (s)
DET 11.17 (12.84) 9.73 (6.20) 11.47 (16.49) 11.64 (9.44) .215 .090
IDN 8.02 (21.82) 6.50 (7.72) 8.74 (30.94) 7.93 (7.05) .260 .352
OBK 7.13 (40.73) 4.93 (8.47) 5.73 (7.37) 10.45 (69.84) .766 .092
OCL 11.70 (35.11) 10.36 (15.85) 11.30 (34.63) 13.09 (43.34) .766 .339
Total CBB 38.03 (60.65) 31.51 (23.97) 37.24 (50.87) 43.12 (84.04) .260 .035
N (%) who did not meet HCI learnability criteria for time spent on instruction screen
DET 24 (1.5%) 3 (0.9%) 8 (1.1%) 13 (2.5%) .903 .448
IDN 7 (0.4%) 2 (0.6%) 3 (0.4%) 2 (0.4%) .903 .614
OBK 6 (0.4%) 1 (0.3%) 2 (0.3%) 3 (0.6%) .903 .614
OCL 11 (0.7%) 4 (1.2%) 3 (0.4%) 4 (0.8%) .472 .614
Time taken to complete cognitive test (s)
DET 72.37 (19.90) 70.05 (16.42) 72.65 (20.40) 73.39 (21.01) .064 .018
IDN 66.53 (17.18) 64.16 (10.16) 66.51 (17.50) 67.99 (19.79) .064 .003
OBK 82.64 (19.96) 80.03 (15.98) 82.32 (20.09) 84.66 (21.69) .085 .003
OCL 213.55 (24.88) 209.84 (22.02) 214.59 (27.93) 214.34 (21.55) .010 .014
Total CBB 435.08 (58.78) 424.09 (44.97) 436.06 (60.87) 440.38 (62.29) .010 .001
N (%) who did not meet HCI learnability criteria for time spent completing test
DET 72 (4.5%) 8 (2.5%) 38 (5.1%) 26 (4.9%) .128 .107
IDN 49 (3.1%) 4 (1.2%) 24 (3.2%) 21 (4.0%) .128 .072
OBK 82 (5.1%) 11 (3.4%) 35 (4.7%) 36 (6.8%) .349 .072
OCL 61 (3.8%) 10 (3.1%) 35 (4.7%) 16 (3.0%) .317 .944

Note: FDR corrections have been applied to all P values; P 1 = 40 to 49 years versus 50 to 59 years; P 2 = 40 to 49 years versus 60 to 70 years; learnability cut‐off was computed as 2 SDs above the mean time taken for individuals who passed error criteria, for test instruction: DET (37.1 s), IDN (52.3 s), OCL (83.7 s) and OBK (90.5 s); and for time spent completing each test: DET (92.0 s), IDN (80.2 s), OCL (261.4 s), and OBK (110.0 s).

Abbreviations: CBB, Cogstate Brief Battery; DET, Detection test; FDR, false‐discovery rate; HADS, Hospital Anxiety and Depression scale; HCI, human computer interaction; IDN, Identification test; OCL, one card learning test; OBK, one‐back test.