Table 5.

Strooptest performance predictions based on sleep condition and time-of-day in the final mixed-effects models.

	Mistake			Cognitive conflict RTV			Behavioural adjustment RTV
Fixed-effect predictors	Odds ratios	CI	p	Estimates	CI	p	Estimates	CI	p
(Intercept)	0.02	0.02–0.03	<0.001	382.12	348.41–415.84	<0.001	434.65	397.51–471.78	<0.001
TSD condition at baseline (22:30)	0.93	0.70–1.25	0.63	−13.01	−57.07–31.05	0.56	−21.90	−70.30–26.49	0.38
Session 1 (08:00)	1.15	0.90–1.47	0.26	34.51	−2.72–71.74	0.07	35.18	−5.56–75.92	0.09
Session 2 (12:30)	0.98	0.77–1.26	0.90	−8.07	−45.13–28.99	0.67	−13.21	−53.76–27.35	0.52
Session 3 (16:30)	1.37	1.08–1.74	<0.01	−7.21	−44.17–29.75	0.70	−6.63	−47.07–33.81	0.75
Observations	63,273
Marginal R2	0.01			0.02			0.02

Note: RTV, response time variation as measured by the standard deviation of the response time in milliseconds; CI, 95% confidence interval; TSD, total sleep deprivation; Marginal R² represents the variance explained by the fixed-effects predictors (Nakagawa et al., 2017). All rows representing categorical variables report the effect compared to a reference level. The reference level for session was the baseline session (22:30 h) therefore all other effect estimates for different levels of session compare to performance at 22:30 h.