Table 2A.

Results of multilevel models testing the temporal associations of nightly sleep variables with daily cognitive interference

	Daily cognitive interference (Day $d+1$)
	B	(SE)
Fixed Effects
Bedtimes (military hours1)
Between-person, Average bedtimes	0.15	(0.17)
Within-person (Day $d$), Previous night's bedtimes	−0.06	(0.09)
Wake times (military hours)
Between-person, Average wake times	−0.05	(0.23)
Within-person (Day $d$), Previous night's wake times	−0.32 **	(0.12)
Sleep Duration (in hours)
Between-person, Average sleep duration	−0.08	(0.17)
Within-person (Day $d$), Previous night's sleep duration	−0.27 **	(0.10)
Sleep Quality (1 to 5:better)
Between-person, Average sleep quality	−0.25**	(0.08)
Within-person (Day $d$), Previous night's sleep quality	−0.17 **	(0.05)
Sleep Latency (in minutes)
Between-person, Average sleep latency	0.77	(2.28)
Within-person (Day $d$), Previous night's sleep latency	1.87	(1.35)

Note. 869–867 days from 130 employees; 8 consecutive days' data were nested within each employee. Tables 2A and 2B represent one bidirectional model. Results are presented for each outcome (cognitive interference in 2A and sleep variables in 2B) separately across Tables 2A and 2B for ease of interpretation. As the two competing temporal directions in Table 2A and Table 2B are estimated simultaneously in one model with including each sleep variable on the outcome side, intercepts, the effects of covariates, and random effects are presented only in Table 2B. Significant effects of interest are bolded.

¹The military hours of bedtimes were centered at midnight (0 = 00:00).

^**P < .01.