Table 2.
Correlation matrix for performance measures in the SST. The bottom diagonal presents the correlation coefficient and the top diagonal presents the p-value from each correlation.
| Bound | Nondecision | Drift | Go mean RT | Go RT sd | SSD | SSRT | Percent Inhibition | |
|---|---|---|---|---|---|---|---|---|
| Bound | -- | 0.001 | 0.002 | < 0.001 | < 0.001 | < 0.001 | 0.044 | 0.012 |
| Nondecision | 0.31 | -- | <0.001 | < 0.001 | < 0.001 | < 0.001 | < 0.001 | < 0.001 |
| Drift | −0.27 | −0.32 | -- | < 0.001 | < 0.001 | < 0.001 | < 0.001 | 0.382 |
| Go mean RT | 0.79 | 0.70 | −0.64 | -- | < 0.001 | < 0.001 | < 0.001 | < 0.001 |
| Go RT sd | 0.53 | 0.40 | −0.74 | 0.79 | -- | < 0.001 | < 0.001 | 0.082 |
| SSD | 0.72 | 0.44 | −0.37 | 0.75 | 0.50 | -- | 0.004 | 0.117 |
| SSRT | 0.18 | 0.35 | −0.44 | 0.40 | 0.41 | −0.26 | -- | 0.669 |
| Percent Inhibition | 0.23 | 0.37 | −0.08 | 0.32 | 0.16 | 0.14 | 0.04 | -- |
Bound = boundary separation from DDM; Nondecision = nondecision (encoding and motor) from DDM; Drift = drift rate (speed of go processing) from DDM; SSD = stop-signal duration; SSRT = stop-signal reaction time.