Behavioral results.

<p>Whiskers represent SEM. A- Left panel: Performance (mean block duration) improvement during training did not differ between the two groups. Middle panel: A significant ((*), p<0.05) offline gain in performance is observed in sleepers but not in sleep deprived subjects between the end of training (Tr) and the beginning of retest (Re). Right panel: Dynamics of mean time to perform a correct sequence (Mean, upper panel) and the standard deviation of difference between the data points (time to perform each correct sequence) and their power-law fit (Std, lower panel) computed over all subjects. Note that variability of performance follows a specific dynamics during training which does not parallel mean performance <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0059490#pone.0059490-Albouy1" target="_blank">[2]</a>. B- Left panel: Mean response time (RT) between two elements within a correct sequence for the first 10 correct sequences by block during both training and retest sessions. Note that the repetition effect is heterogeneous across blocks and that a significant fatigue effect manifests in block 8. Right panel: Between-session gains in performance are due to a rapid increase in RT during the retest session rather than to a slow-down in performance at the end of the training session ((*), p<0.05; (o), p>0.05).