Fig. S3.

A representative example of the effect of sleep timing on the association between the absolute mean slope and the amplitude of the SWs during the first and second half of the sleep episode (BB0135, Female, 23 years).

Fitted least square mean regression lines between the absolute mean slope and the amplitude of the SWs (negative half waves > 37.5 μV, absolute value) as measured during the first and the second half of the night when sleeping at habitual nocturnal bedtimes s (FDn1) and the sleep episode starting 12 h later, i.e. during the biological day (FDn4). The data show that when sleeping during the biological day, for any given amplitude the slope is greater, than when sleeping during the biological night.