Table 3.
Correlations among dependent variables in older and younger adult samples
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| 1. Mean RT | - | .63* | −.25 | .15 | .43* | −.10 | .13 | −.45* | .13 |
| 2. Vigilance decrement | .40* | - | −.08 | .29 | .32 | −.16 | .21 | −.17 | .20 |
| 3. Motivation | .17 | .02 | - | −.32 | −.58* | .07 | −.16 | .32 | .01 |
| 4. Drowsiness | .25 | .19 | .05 | - | .40* | .07 | .28 | −.34 | −.08 |
| 5. Task-unrelated thoughts | .25 | .25* | .05 | .41* | - | −.08 | .19 | −.48* | −.07 |
| 6. Pretrial pupil mean | −.04 | .17 | −.31* | .01 | .15 | - | .49* | −.10 | .00 |
| 7. Pretrial pupil SD | .20 | .24 | −.09 | .25 | .20 | .49* | - | −.25 | .09 |
| 8. TEPR magnitude | −.29* | −.20 | .01 | −.31* | −.07 | −.03 | −.38* | - | .38 |
| 9. TEPR latency | .67* | .31* | .10 | .15 | .19 | −.02 | .26 | −.06 | - |
Note. Correlations among the older adults (N = 62) are listed below the diagonal, and correlations among the younger adults (N = 60) are listed above the diagonal. SD = standard deviation, TEPR = task-evoked pupillary response, asterisks indicate significant correlations at p < .05.