A–B, Adjusted pupil dilation before
and after the outcome devaluation procedure: in
(A) Experiment 1, *F(1,38) =
4.93, p = .032,
η2p
= .115, 90% CI [.005, .276] and (B) Experiment 2,
**F(1,19) = 8.08, p = .010,
η2p
= .298, 90% CI [.045, .504]. Bars represent a change score in the pupil dilation
induced by the outcome devaluation procedure (change score = adjusted pupil
dilation after satiation – adjusted pupil dilation before satiation).
C–D Adjusted Dwell Time (DW) spent
in the Region of Interest (ROI) congruent with the CS+ prediction (i.e., left
ROI for the CS+ predicting the outcome delivery to the left and right ROI for
the CS+ predicting the outcome delivery to the right) before and after the
outcome devaluation procedure in Experiment 1 (C)
and Experiment 2 (D). Bars represent the change
score in dwell time induced by outcome devaluation (change score = adjusted
dwell time in the after satiation – adjusted dwell time before
satiation). Results depicted from Experiment 1 are shown separately for the CSs+
in the satiation group that underwent outcome devaluation and the control group
that did not, while results from Experiment 2 show effects from the CS+
associated with the devalued outcome and the CS+ associated with the outcome
that was still valued. Plots of Experiment 1 are based on 40 participants and
error bars indicate the between subjects standard error of the mean; plots from
Experiment 2 are based on 20 participants and error bars indicate the within
subject standard errors of the mean.