title: Automaticity of higher cognitive functions: neurophysiological evidence for unconscious syntactic processing of masked words.
abstract: Models of language comprehension assume that syntactic processing is automatic, at least at early stages. However, the degree of automaticity of syntactic processing is still controversial. Evidence of automaticity is either indirect or has been observed for pairs of words, which might provide a poor syntactic context in comparison to sentences. The present study investigates the automaticity of syntactic processing using event-related brain potentials (ERPs) during sentence processing. To this end, masked adjectives that could either be syntactically correct or incorrect relative to a sentence being processed appeared just prior to the presentation of supraliminal adjectives. The latter could also be correct or incorrect. According to our data, subliminal gender agreement violations embedded in a sentence trigger an early anterior negativity-like modulation, whereas supraliminal gender agreement violations elicited a later anterior negativity. First-pass syntactic parsing thus appears to be unconsciously and automatically elicited. Interestingly, a P600-like modulation of short duration and early latency could also be observed for masked violations. In addition, masked violations also modulated the P600 component elicited by unmasked targets, probably reflecting that the mechanisms of revising a structural mismatch appear affected by subliminal information. According to our findings, both conscious and unconscious processes apparently contribute to syntactic processing. These results are discussed in line with most recent theories of automaticity and syntactic processing.
authors.affiliation: Center for Human Evolution and Behavior, UCM-ISCIII, Madrid, Spain; Psychobiology Department, Complutense University of Madrid, Madrid, Spain. Electronic address: laura.jimenez.ortega@psi.ucm.es.
authors.forename: Laura
authors.initials: L
authors.lastname: Jiménez-Ortega
authors.affiliation: Center for Human Evolution and Behavior, UCM-ISCIII, Madrid, Spain.
authors.forename: Marcos
authors.initials: M
authors.lastname: García-Milla
authors.affiliation: Center for Human Evolution and Behavior, UCM-ISCIII, Madrid, Spain.
authors.forename: Sabela
authors.initials: S
authors.lastname: Fondevila
authors.affiliation: Center for Human Evolution and Behavior, UCM-ISCIII, Madrid, Spain; Psychobiology Department, Complutense University of Madrid, Madrid, Spain.
authors.forename: Pilar
authors.initials: P
authors.lastname: Casado
authors.affiliation: Center for Human Evolution and Behavior, UCM-ISCIII, Madrid, Spain.
authors.forename: David
authors.initials: D
authors.lastname: Hernández-Gutiérrez
authors.affiliation: Center for Human Evolution and Behavior, UCM-ISCIII, Madrid, Spain; Psychobiology Department, Complutense University of Madrid, Madrid, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Martín-Loeches
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D003071:Cognition / Q000502:physiology; D032882:Comprehension / Q000502:physiology*; D004569:Electroencephalography / Q000379:methods; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D055815:Young Adult
keywords: Anterior negativities; Automatic processing; Language comprehension; Masked priming; P600; Syntactic processing; Unconscious processing