Table 3.
Mixed-effects model results for PVT task variables
| df | C = ToT |
C = RSI |
|||||
|---|---|---|---|---|---|---|---|
| RT | %CE | %Lapses | RT | %CE | %Lapses | ||
| Tests of Fixed Effects | |||||||
| Day | 1, 380 | 83.84 | 10.24 | 91.05 | 78.95 | 4.70 | 79.14 |
| C | 1, 380 | 14.95 | 0.75 | 30.1 | 539.67 | 44.37 | 87.81 |
| Day * C | 1, 380 | 7.51 | 5.70 | 23.06 | 2.43 | 1.22 | 0.53 |
| Deg | 4, 380 | 5.90 | 0.37 | 2.50 | 6.91 | 0.51 | 4.47 |
| Day * Deg | 4, 380 | 1.50 | 0.00 | 1.51 | 1.66 | 0.09 | 1.19 |
| C * Deg | 4, 380 | 0.80 | 0.17 | 0.29 | 1.64 | 0.38 | 1.26 |
| Day * C * Deg | 4, 380 | 0.73 | 0.05 | 0.93 | 1.13 | 0.26 | 0.30 |
| Log Linear Contrasts | |||||||
| Deg | 1, 380 | 21.55 | 0.17 | 8.80 | 24.99 | 0.15 | 15.67 |
| Deg * Day | 1, 380 | 4.19 | 0.01 | 1.01 | 4.34 | 0.01 | 0.73 |
| Deg * C | 1, 380 | 1.32 | 0.00 | 0.39 | 5.76 | 0.17 | 4.49 |
| Deg * Day * C | 1, 380 | 1.73 | 0.05 | 0.00 | 0.95 | 0.18 | 0.76 |
Table values are F for tests of fixed effects and for planned contrasts. Values in italics are significant at the α = 0.05 level. Deg, degradation level; C, either ToT effect or RSI effect as noted in column headers; ToT, Time on task; RSI, response-stimulus interval; df, degrees of freedom; RT, mean reaction time; %CE, percent commission errors; %Lapses, percent lapses.