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. Author manuscript; available in PMC: 2009 Dec 23.
Published in final edited form as: Psychon Bull Rev. 2009 Aug;16(4):742–751. doi: 10.3758/PBR.16.4.742

Figure 4.

Figure 4

Plots of the diffusion model parameters averaged over participants for the three sessions in the experimental (sleep-deprived) group (1) and the control group (2). Sleep deprivation in Session 2 produced significant effects of boundary separation, the proportion of contaminants, the three drift rates, starting point variability across trials, and nondecision variability across trials. The effects on the nondecision component and variability in drift rate across trials were not significant.