Table 3.
Decision-making performance. Descriptive statistics (mean ± standard deviation) of measures that inform the decision-making process, including standard behavioural metrics (upper part) and four main parameters of the diffusion decision model (lower part), as a function of the task and the condition.
| Variable (unit) | Classical stop-signal task | Sensorial stop-signal task | ||||
|---|---|---|---|---|---|---|
| Condition | Condition | |||||
| Control | Otolith | Canal | Control | Otolith | Canal | |
| PGo (%) | 98 ± 2 | 98 ± 4 | 97 ± 3 | 91 ± 6 | 90 ± 10 | 91 ± 7 |
| RTTot (ms) | 446 ± 77 | 442 ± 85 | 461 ± 88 | 417 ± 93 | 407 ± 107 | 416 ± 112 |
| RTCorrect (ms) | 447 ± 77 | 443 ± 85 | 461 ± 86 | 410 ± 94 | 401 ± 103 | 408 ± 113 |
| RTError (ms) | 361 ± 88 | 326 ± 70 | 457 ± 294 | 518 ± 121 | 450 ± 191 | 490 ± 174 |
| IIV RT (ms) | 105 ± 22 | 96 ± 24 | 115 ± 50 | 138 ± 31 | 138 ± 34 | 153 ± 60 |
| a (a.u.) | 1.78 ± 0.18 | 1.73 ± 0.16 | 1.74 ± 0.13 | 1.35 ± 0.21 | 1.33 ± 0.24 | 1.26 ± 0.15 |
| ν (a.u.) | 4.00 ± 0.44 | 4.20 ± 0.46 | 3.91 ± 0.36 | 1.49 ± 1.44 | 1.26 ± 1.40 | 1.43 ± 1.23 |
| t0 (ms) | 224 ± 68 | 238 ± 77 | 239 ± 62 | 151 ± 78 | 151 ± 95 | 143 ± 85 |
| z (a.u.) | 0.51 ± 0.05 | 0.51 ± 0.06 | 0.51 ± 0.06 | 0.52 ± 0.07 | 0.50 ± 0.06 | 0.51 ± 0.07 |
PGo: decision-making accuracy (percentage of Go-trials with correct responses); RTTot: mean reaction time for all Go-trials; ms: milliseconds; RTCorrect: mean reaction time for Go-trials with correct responses; RTError: mean reaction time for Go-trials with errors; IIV RT: intra-individual variability in reaction times; a: response caution ; a.u.: arbitrary unit; ν: drift rate; t0: non-decision time; z: starting point SSRT: stop signal reaction time; ms: milliseconds; SSD: stop signal delay; µStop: mean of the Gaussian component of the SSRTs distribution; σStop: standard deviation of the Gaussian component of the SSRTs distribution; τStop: mean of the exponential component of the SSRTs distribution; GF: Go failure (percentage of Go stimuli missed by the subject); TF: trigger failure (percentage of stop-signal missed by the subject).