Table 5.
Model Estimates for PVT a) Lapses and b) Speed
| Parameter | SE | d.f. | t-value | P-value | |
|---|---|---|---|---|---|
| a) lapses | |||||
| Fixed effects | |||||
| Intercept (ms) | 0.23 | 3.35 | 273 | 0.07 | 0.47 |
| Restriction slope (RESTRICT)* | 2.70 | 0.40 | 273 | 6.80 | 0.00 |
| Age | −0.05 | 0.11 | 21 | −0.40 | 0.35 |
| Transition to recovery (TRANS)* | −15.33 | 2.70 | 273 | −5.67 | 0.00 |
| Recovery slope (RECOV)* | −3.14 | 0.88 | 273 | −3.54 | 0.00 |
| Prior sleep group (Group) | 1.03 | 1.43 | 21 | 0.72 | 0.24 |
| RESTRICT X Age* | −0.09 | 0.01 | 273 | −6.75 | 0.00 |
| Age X TRANS* | 0.44 | 0.09 | 273 | 4.86 | 0.00 |
| Age X RECOV* | 0.12 | 0.03 | 273 | 4.02 | 0.00 |
| RESTRICT X Group* | 0.40 | 0.17 | 273 | 2.35 | 0.01 |
| TRANS X Group | −0.85 | 1.16 | 273 | −0.73 | 0.23 |
| RECOV X Group* | −0.75 | 0.39 | 273 | −1.94 | 0.03 |
| Correlations | |||||
| Variance components | |||||
| Intercept | 8.70 | ||||
| Transition to recovery | 2.45 | −0.66 | |||
| Residual | 4.75 | ||||
| Fit indices | |||||
| Deviance (−2 Log-likelihood) | −677.96 | ||||
| AIC | 1389.91 | ||||
| BIC | 1452.53 | ||||
| b) speed | |||||
| Fixed effects | |||||
| Intercept (ms)* | 3.68 | 0.53 | 273 | 6.88 | 0.00 |
| Restriction slope (RESTRICT)* | −0.34 | 0.05 | 273 | −7.34 | 0.00 |
| Age | 0.02 | 0.02 | 21 | 1.03 | 0.16 |
| Transition to recovery (TRANS)* | 1.72 | 0.26 | 273 | 6.66 | 0.00 |
| Recovery slope (RECOV)* | 0.33 | 0.10 | 273 | 3.22 | 0.00 |
| Prior sleep group (Group) | −0.20 | 0.23 | 21 | −0.89 | 0.19 |
| RESTRICT X Age* | 0.01 | 0.00 | 273 | 4.81 | 0.00 |
| Age X TRANS* | −0.03 | 0.01 | 273 | −3.22 | 0.00 |
| Age X RECOV* | −0.01 | 0.00 | 273 | −2.71 | 0.00 |
| RESTRICT X Group | 0.01 | 0.02 | 273 | 0.64 | 0.26 |
| TRANS X Group* | −0.23 | 0.11 | 273 | −2.10 | 0.02 |
| RECOV X Group | 0.05 | 0.05 | 273 | 1.12 | 0.13 |
| Variance components | |||||
| Intercept | 0.26 | ||||
| Residual | 0.06 | ||||
| Fit indices | |||||
| Deviance (−2 Log-likelihood) | −45.90 | ||||
| AIC | 121.81 | ||||
| BIC | 177.06 | ||||
Abbreviations: RESTRICT = Sleep Restriction slope; TRANS = recovery Transition parameter; RECOV = recovery slope;
*
P < 0.05, one-tailed