Pavlovian approach responses in the PCA task.

<p>Results showing the probability of approach responses, mean + s.e.m., of (A) the simulated models and (B) the animal experiments <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0108142#pone.0108142-Flagel4" target="_blank">[25]</a>. ST: sign-tracking, GT: goal-tracking. The plots show the probability of sign-tracking responses relative to the probability of goal-tracking responses in the range [−1, 1].