Behavioural evidence for parallel outcome-sensitive and outcome-insensitive Pavlovian learning systems in humans.

Pupil dilation: We obtained a trend similar to the effect found in Experiment 1, as indicated by a planned contrast analysis using F-tests conducted on the CS condition (CS+L, CS+R, CS-) with the following weights (+0.5, +0.5, -1) revealed that the pupil was less constricted for the CS+ L and the CS+ R compared to the CS-, F (1,19) = 3.27, p = .086, η 2 p = .147, 90% CI [.000, 0.368], although this effect did not reach statistical significance.

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