Table 2.
Mean reaction time (RT) from correct trials (ms) for each task condition (cue × target), for the controls, AD and LBD patients.
| HC (n = 22) | AD (n = 31) | LBD (n = 45) | ||
|---|---|---|---|---|
| (A) Mean reaction time (ms) | ||||
| All trials | 964.6 (147.5) | 1319.8 (322.6) | 1558.3 (391.0) | |
| No Cue | Overall | 1025.1 (162.6) | 1363.2 (325.3) | 1587.0 (377.4) |
| Congruent | 806.7 (110.2) | 1059.8 (270.2) | 1280.4 (288.4) | |
| Incongruent | 1243.4 (241.4) | 1666.6 (402.4) | 1893.6 (491.9) | |
| Neutral | Overall | 978.9 (147.3) | 1334.1 (309.5) | 1585.9 (413.0) |
| Congruent | 795.7 (98.8) | 1072.0 (267.7) | 1293.7 (302.6) | |
| Incongruent | 1162.0 (222.4) | 1596.1 (383.6) | 1878.2 (553.6) | |
| Spatial | Overall | 900.00 (136.4) | 1262.0 (342.9) | 1502.0 (395.8) |
| Congruent | 710.5 (89.5) | 989.1 (314.1) | 1245.7 (355.7) | |
| Incongruent | 1069.5 (203.5) | 1534.9 (411.0) | 1758.4 (478.9) | |
| Congruent | Overall | 771.0 (97.6) | 1040.3 (278.0) | 1273.3 (302.8) |
| Incongruent | Overall | 1158.3 (220.8) | 1599.2 (393.0) | 1843.4 (496.4) |
| (B) ANT effects (ms) | ||||
| Alerting | 46.2 (37.0)* | 29.14 (80.84) | 1.1 (93.7) | |
| Orienting | 88.9 (35.0)* | 72.07 (74.62)* | 83.9 (112.9)* | |
| Executive conflict | 387.4 (171.9)* | 558.88 (217.13)* | 570.1 (254.2)* |
Standard deviations are presented in brackets. AD, Alzheimer’s disease; HC, healthy controls; LBD, Lewy body dementia; *Significant attention network test (ANT) effect, p-value < 0.05 for normalized RTs.