Neuronal activation.

<p>(A) Neuronal activation for paired (CS+) and unpaired (CS−) faces is compared between sessions (i.e., between the pre- and the post-learning phases). <i>F</i>-values (<i>p</i><.05) for the SESSION × CS-TYPE interaction are projected onto a standard brain shown from right frontal view. Colored areas represent <i>F</i>-values significant with <i>p</i><.05 based on the non-parametric statistical analysis. Black disks visualize the prefrontal test dipole locations used for the following post hoc parametric tests, while red disks visualize the actual extent on cluster level. (B) Bars depict the mean regional amplitude towards CS+ and CS− across sessions for the test dipole locations and the respective 95% confidence intervals. (C) Neuronal activation for CS+ and CS− is compared across the three runs of the learning phase. Coding of effects is identical to (A). (D) Bars depict the mean regional amplitude towards CS+ and CS− across the three runs of the learning phase for the test dipole locations and the respective 95% confidence intervals.