Table 8.
AX-continuous performance task baseline session reliability
| Measure | Split-half (95% CI) | Test–retest (95% CI) | M | Range | Skew | Kurtosis |
|---|---|---|---|---|---|---|
| Reaction time | ||||||
| AX trials | .98 (.97−.98) | .60 (.39−.74) | 449 ms | 295–827 ms | 1.82 | 8.78 |
| AY trials | .90 (.86−.93) | .72 (.61−.80) | 540 ms | 376–835 ms | 1.74 | 8.60 |
| BX trials | .89 (.86−.92) | .56 (.22−.74) | 516 ms | 267–1468 ms | 1.45 | 5.45 |
| BY trials | .98 (.98−.98) | .64 (.22−.82) | 441 ms | 273–788 ms | 1.60 | 8.21 |
| PBI | .72 (.62−.80) | .26 (.05−.44) | .03 | – .40 to .24 | – .29 | – .27 |
| BX interference | .71 (.60−.80) | .45 (.26−.60) | 75 ms | – 109 to 872 ms | 1.06 | 1.36 |
| Error | ||||||
| AX trials | .89 (.86−.92) | .15 (– .03 to .32) | 6.6% | 0–80% | 1.03 | 3.31 |
| AY trials | .45 (.27−.60) | .22 (.05−.38) | 7% | 0–44% | 2.19 | 9.33 |
| BX trials | .68 (.57−.76) | .30 (.07−.48) | 13.8% | 0–80% | 1.12 | 3.77 |
| BY trials | .64 (.48−.78) | .05 (– .12 to. 22) | 1.1% | 0–19% | .20 | 1.96 |
| A no-go trials | .66 (.54−.74) | .20 (.03−.36) | 11.1% | 0–72% | .78 | 2.98 |
| B no-go trials | .73 (.66−.80) | .28 (.09−.45) | 22.3% | 0–80% | 4.25 | 28.00 |
| PBI | .69 (.59−.76) | .15 (– .03 to .32) | – .18 | – .94 to .89 | .48 | – 1.11 |
| BX interference | .78 (.70−.84) | .39 (.17−.56) | 2.85 | – .23 to 4.4 | .75 | .13 |
| d′ context | .55 (.41−.66) | .23 (.05−.39) | .09 | – 1.14 to .87 | – .05 | – .36 |
| A-cue bias | .62 (.50−.72) | .27 (.06−.45) | 1.08 | – .52 to 2.83 | – .08 | – .62 |
Note. N = 112. CI confidence interval; PBI proactive behavioral index. Split-half is an average of the test and retest phase split-half reliabilities. Test–retest = ICC (2,1)