Table 9.
AX-continuous performance task proactive session reliability
| Measure | Split-half (95% CI) | Test–retest (95% CI) | M | Range | Skew | Kurtosis |
|---|---|---|---|---|---|---|
| Reaction time | ||||||
| AX trials | .98 (.98−.99) | .80 (.73−.86) | 415 ms | 257–832 ms | 1.45 | 6.27 |
| AY trials | .88 (.82−.92) | .69 (.58−.78) | 541 ms | 378–871 ms | 1.94 | 9.25 |
| BX trials | .92 (.89−.94) | .68 (.56−.76) | 460 ms | 259–1010 ms | 1.64 | 6.26 |
| BY trials | .98 (.98−.99) | .79 (.70−.85) | 410 ms | 253–710 ms | 1.43 | 7.46 |
| PBI | .80 (.72−.85) | .51 (.36−.64) | .09 | – .26 to .32 | – .50 | .64 |
| BX interference | .77 (.69−.84) | .50 (.34−.62) | 51 ms | – 91 to 493 ms | 1.92 | 6.59 |
| Error | ||||||
| AX trials | .92 (.88−.94) | .54 (.40−.66) | 5.7% | 0–80% | .95 | 3.17 |
| AY trials | .81 (.76−.86) | .27 (.08−.44) | 18.6% | 0–80% | 1.87 | 7.17 |
| BX trials | .67 (.56−.76) | .34 (.17−.49) | 10.7% | 0–56% | .75 | 2.63 |
| BY trials | .58 (.41−.73) | .35 (.18−.49) | 1.1% | 0–15% | – .06 | 7.97 |
| A no-go trials | .82 (.78−.88) | .38 (.20−.53) | 17% | 0–80% | 1.24 | 3.93 |
| B no-go trials | .82 (.77−.87) | .29 (.06−.48) | 32% | 0–80% | 3.21 | 17.40 |
| PBI | .80 (.73−.86) | .39 (.20−.56) | .16 | – .89 to .94 | – .25 | – 1.20 |
| BX interference | .80 (.72−.85) | .55 (.40−.66) | 3.09 | – .92 to 4.40 | 1.18 | .90 |
| d′ context | .79 (.71−.85) | .42 (.24−.57) | .37 | – 1.99 to 1.47 | – .17 | – .70 |
| A-cue bias | .62 (.50−.73) | .29 (.11−.45) | .93 | – .5 to 2.47 | 0.01 | – .56 |
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)