RT info:eu-repo/semantics/article
T1 Novel Word Learning: Event-Related Brain Potentials Reflect Pure Lexical and Task-Related Effects
A1 Bermúdez Margaretto , Beatriz
A1 Beltrán Guerrero, David
A1 Cuetos, Fernando
A1 Domínguez Martínez, Alberto
K1 novel word learning
K1 lexical decision task
K1 reading task
K1 event-related brain potentials
K1 N400
AB Previous research has pointed out that the combination of orthographic and semanticassociative training is a more advantageous strategy for the lexicalization of novelwritten word-forms than their single orthographic training. However, paradigms usedpreviously involve explicit stimuli categorization (lexical decision), which likely influenceword learning. In the present study, we used a more automatic task (silent reading) todetermine the advantage of the associative training, by comparing the brain electricalsignals elicited in combined (orthographic and semantic) and single (only orthographic)training conditions. In addition, the learning effect (in terms of similar neurophysiologicalactivity between novel and known words) was also tested under a categorizationparadigm, enabling determination of the possible influence of the training task in thelexicalization process. Results indicated that novel words repeatedly associated withmeaningful cues showed a higher attenuation of N400 responses than those trainedin the single orthographic condition, confirming the higher facilitation in the lexicosemantic processing of these stimuli, as a consequence of semantic associations.Moreover, only when the combined training was carried out in the reading task didnovel words show similar N400 responses to those elicited by known words, suggestingthe achievement of a similar lexical processing to known words. Crucially, whenthe training is carried out under a demanding task context (lexical decision), knownwords exhibited positive enhancement within the N400 time window, contributing tomaintaining N400 differences with novel trained words and confounding the outcomeof the learning. Such deflection—compatible with the modulation of the categorizationrelated P300 component—suggests that novel word learning could be influenced by theactivation of categorization-related processes. Thus, the use of low-demand tasks arisesas a more appropriate approach to study novel word learning, enabling the build-upprocess of mental representations, which probably depends on
YR 2019
FD 2019
LK http://riull.ull.es/xmlui/handle/915/35477
UL http://riull.ull.es/xmlui/handle/915/35477
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 19-nov-2024