Table S6.

Akaike's information criterion (AIC) for the Models in Table S2 fit to Digit Symbol Substitution Test (DSST) number correct across recovery sleep doses (smallest AIC values are shown first as they indicate the most adequately fitting models).

Model	AIC	Estimate	R	R2
1	692.6	15.967	0.9476	0.8979
3	696.7	16.519	0.9171	0.8411
0	779.9	33.381	0.8869	0.7867

^*Models 2 and 4 were not estimable.