Figure 5.

No effects of endogenous arousal fluctuations on choice rate. A, Choice proportion for the effortful option as a function of pretrial PBL bins. B, Weights of logistic regression of choice on reward, effort, RT, PBL, and the interactions. C, Weights of logistic regression of choice on reward, effort, RT, and residual variance of PBL after regressing out influences from previous trial (t-1). Bar plots display mean ± 1 SEM. Symbols indicate significance levels against zero: star for p < 0.001, triangle for p < 0.01, diamond for p < 0.05. c, constant; RT, reaction time; R, reward levels; E, effort levels; PBL*, residual PBL.