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.