Supplemental data

Files in this Data Supplement:

• supplemental material - Figure S1 : Memory performance (percentage of correctly recalled words) during immediate and delayed recall after the easy and the difficult encoding conditions. * = p <_0.05:_ xmlns:_0.05="urn:x-prefix:_0.05" paired="paired" t-tests.--="t-tests.--" end="end" desc="desc" spimem_supp1.gif="spimem_supp1.gif" _--="_--">
• supplemental material - Figure S2 : Time course of subjective sleepiness (KSS scale) and salivary melatonin during the three experimental blocks (difficult encoding: black circles, easy encoding: white circles, control condition: black triangles). Repeated measures ANOVA did not reveal any significant difference between the interaction time and condition for subjective sleepiness (time*condition; F2,12 = 0.61; p > 0.5) and for melatonin secretion (time*condition; F2,12 = 1.25; p > 0.2) between the 3 conditions.
• supplemental material - Figure S3 : Relative EEG power density (% of control condition) during stage 2 sleep for F3 after the difficult encoding condition (a) and the easy encoding condition (b). 100 % = Control condition, black reference line. SEMs are illustrated in dashed lines. Grey bars indicate the significant increase of EEG power density after the learning compared to the control condition (paired t-test comparisons).