(Neuron 80, 519–530; October 16, 2013) In this issue, we, the editors of Neuron, are publishing the Correction from Sandra Iglesias, Klaas Enno Stephan, and colleagues, which explains how the error in their Neuron manuscript (Iglesias et al., 2013, Neuron 80, 519–530) arose and the effects of the error. Our decision to publish the Correction is based on the nature of the error, which was one of computational analysis. The authors failed to switch off the default code in their main analytical software, and this error subsequently impacted all downstream analysis and thus multiple figures and tables. After discussion of the error and the changes after application of the correct analysis amongst the Neuron editorial team, the Cell Press Editorial Department leadership team, and external experts in the field, we agreed that this type of mistake is not uncommon in fMRI analysis, and as in this case the main conclusions of the study remain intact, it would serve the community to publish a detailed and transparent correction that explains the error and presents the corrected figures using the intended analysis that was originally reported in the paper. We respect and appreciate the authors’ step in coming forward to bring the error to the attention of the field. Hierarchical Prediction Errors in Midbrain and Basal Forebrain during Sensory LearningIglesias et al.NeuronOctober 16, 2013In BriefPrediction errors (PEs) are crucial teaching signals for learning. Iglesias et al. show that different PEs map onto distinct neurotransmitter systems: the dopaminergic midbrain signals PEs about visual stimulus outcomes, while the cholinergic basal forebrain encodes PEs about stimulus probabilities. Full-Text PDF Open ArchiveHierarchical Prediction Errors in Midbrain and Basal Forebrain during Sensory LearningIglesias et al.NeuronMarch 20, 2019In Brief(Neuron 80, 519–530; October 16, 2013) Full-Text PDF Open Archive