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. 2018 Feb 26;12:72. doi: 10.3389/fnhum.2018.00072

FIGURE 2.

FIGURE 2

Study design. All subjects stayed in the laboratory from 2 pm to 7 pm. The two experimental groups sleep incubation (s_inc+) and wake incubation (w_inc+) experienced a 3-h incubation period between initial encoding and retest. Both control groups (s_inc- and w_inc-) did not experience an incubation period, but the sleep no incubation group (s_inc–) slept for 3 h before encoding and retest. EEG: application of EEG electrodes.