Single-trial neurodynamics reveal N400 and P600 coupling in language comprehension

Abstract Theories of the electrophysiology language comprehension are mostly informed by event-related potential effects observed between condition averages. We here argue that a dissociation competing effect-level explanations potentials can be achieved turning to predictions and analyses at single-trial level. Specifically, we examine dynamics in data exhibited biphasic N400–P600 effect pattern. A group multi-stream models explain positing each individual trial should induce either an N400 increase or P600 increase, but not both. An alternative, single-stream account, Retrieval-Integration theory, explicitly predicts amplitude correlated In order investigate P600, apply regression-based technique which quantify extent amplitudes predictive electroencephalogram time window. Our findings suggest that, indeed, inversely within-trial and, hence, driven same trials. Critically, demonstrate this finding also extends only monophasic conditions. sum, observation is with on by-trial basis supports single stream view, such as difficult reconcile processing mechanisms proposed models.