Table 2.
Cohort reaction times [median, interquartile range].
| Cohort |
Measure |
Motor-corrected |
|||||
|---|---|---|---|---|---|---|---|
| SRT | CRT | SSRT | CRT-SRT | SSRT-SRT | p value | ||
| Healthy Controls | 0.33, 0.31–0.38 |
0.60, 0.53–0.68 |
0.93, 0.79–1.04 |
0.24, 0.30–0.32 |
0.57, 0.47–0.70 |
<0.0001 | |
| HD-ISS |
Stage 0 |
0.35, 0.32–0.40 |
0.58, 0.53–0.72 |
0.93, 0.81–0.99 |
0.24, 0.16–0.35 |
0.53, 0.44–0.66 |
<0.0001 |
| Stage 1 | 0.37, 0.35–0.41 |
0.68, 0.60–0.76 |
1.06, 0.87–1.22 |
0.30, 0.22–0.36 |
0.65, 0.51–0.83 |
<0.0001 | |
| Stage 2 | 0.40, 0.34–0.47 |
0.67, 0.61–0.88 |
1.18, 0.93–1.48 |
0.30, 0.24–0.39 |
0.73, 0.57–1.07 |
<0.0001 | |
| Stage 3 | 0.51, 0.44–0.73 |
0.97, 0.82–1.15 |
1.66, 0.34–2.11 |
0.45, 0.31–0.61 |
1.09, 0.94–1.42 |
<0.0001 | |
SRT, Simple Reaction Time; CRT, Choice Reaction Time; SSRT, Semantic Search Reaction. Within-group comparisons of CRT-SRT versus SSRT-SRT values were conducted via Mann-Whitney U test.