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N400 - Scholarpedia

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Dr. Kara D. Federmeier, Department of Psychology and the Beckman Institute, University of Illinois, Urbana IL USA The N400 is a feature ("component") of the human scalp-recorded event-related brain potential (ERP). Its name derives from the fact that the N400 is a negative-going potential (relative to a reference behind the ear), which peaks around 400 ms post-stimulus onset (and is observed between about 250 and 550 ms) in young adults. The N400 forms part of the typical electrical brain activity seen in response to a wide array of meaningful and potentially meaningful stimuli, including visual and auditory words (and word-like strings of letters), acronyms, sign language signs, pictures, environmental sounds, and gestures. In 1978, Kutas and Hillyard began a series of studies to investigate the influence of sentence contexts on word recognition using event-related brain potentials (ERPs) as a dependent measure. They predicted that encountering an unexpected word would elicit an ERP c

Dr. Marta Kutas, Cognitive Science, UC San Diego, CA Dr. Kara D. Federmeier, Department of Psychology and the Beckman Institute, University of Illinois, Urbana IL USA The N400 is a feature ("component") of the human scalp-recorded event-related brain potential (ERP). Its name derives from the fact that the N400 is a negative-going potential (relative to a reference behind the ear), which peaks around 400 ms post-stimulus onset (and is observed between about 250 and 550 ms) in young adults. The N400 forms part of the typical electrical brain activity seen in response to a wide array of…

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