Table 2.

Lagged cross-correlations in ± 8 days

Lag number	R value	Significance
−8	−.72	.000
−7	−.72	.000
−6	−.72	.001
−5	−.72	.001
−4	−.71	.001
−3	−.71	.001
−2	−.70	.001
−1	−.70	.001
Concurrent	−.70	.001
1	−.70	.001
2	−.71	.001
3	−.72	.001
4	−.72	.000
5	−.72	.000
6	−.72	.000
7	−.72	.001
8	−.71	.001

Lagged cross correlations between log of sleep efficiency ratios and log of mean maladaptive behaviors for 8 days before and 8 days after the target evening of sleep. Negative correlations indicate that poor sleep is related to problem behaviors and that the relation between these variables is chronic and not acute