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. 2010 Jan 1;5(1):e8395. doi: 10.1371/journal.pone.0008395

Figure 4. Experimental protocol.

Figure 4

Time production sessions (TPS) were conducted twice at around 21:00 on day 1 and about 09:00 on day 2 in the sleep-controlled (SC) and the sleep-deprived (SD) settings. The two conditions were randomly scheduled with a 1-day interval. Each TPS included 15 trials, each of which participants started and ended with their own button presses. Functional near-infrared spectroscopy (fNIRS) data were recorded continuously through the sessions.