Click on image to view larger version.
Fig. 3. Difference in valence ratings for old (familiar) and new (unfamiliar) aversive pictures obtained at judgment 2 after 3-hour intervals of sleep (black) and wakefulness (gray) during the early (left) and late night (middle). Right, results of a supplementary condition, in which judgments were obtained before and after a period of sleep across a total night (11:00 PM–6:00 AM). Note enhanced negativity for old-new difference (ie, increased emotional reactivity) after late sleep compared with late wakefulness and with early sleep. The total 7-hour period of sleep likewise revealed enhanced negativity, which was also significant in comparison with the effects of early sleep and late wakefulness (not shown) and tended to be more pronounced than after late sleep. # p< .05, ## p< .01 for difference from zero; * p< .05, (*) p< .10 for comparisons between conditions.
