FIGURE 6.

Sleep deprivation-induced increases in perseveration and performance decrements after image reversal. The control (CONT) and sleep deprivation (SD) groups performed similarly on all three measures during the PD phase. Initially, the SD group had fewer total errors (A), perseverative errors (B), and perseveration bouts (C) than the CONT group at the start of the reversal phase (REV). However, during the middle of the reversal phase the SD group performed worse than the CONT group. During the latter half of the pairwise discrimination training phase (PD), the SD group produced fewer total errors than the CONT group. Data are reported in means and standard errors (⁺p < 0.07, *p < 0.05, **p < 0.01).