Neural Adaptation to Speaker Reliability and Disfluencies in Speech: An Individual Differences Study
Nardulli, Rebecca L.
- Past research has shown that cognitive differences between individuals impact the way we process and comprehend language (Shah & Miyake, 1996; Boudewyn, 2015). Specifically, individuals with greater executive function, as indexed by better performance on cognitive tasks such as the AX-Continuous Performance Task, have been found to have stronger receptive vocabularies, grammatical abilities, and ... read morenatural language comprehension (Daltrozzo, Emerson, Deocampo, Singh, Freggens, Branum-Martin, & Conway, 2017; Misyak & Christiansen, 2011). These differences impact the way that we, as listeners, make predictions about upcoming lexical items. Disfluency also influences our predictive abilities (Arnold, Hudson Kam, & Tanenhaus, 2007). The present ERP study of the N400 effect following disfluency investigates how people’s predictions about sentence continuations are mediated by the presence of disfluency, cloze probability, and implicit knowledge of the speaker’s reliability (Brown et al., 2017). This exploratory analysis aims to use neuropsychological measures indexing constructs such as cognitive inhibition, statistical learning, personality type, and working memory to explore the sources of individual differences in both prediction and adaptation as found in this ERP study. While the results of our analysis indicated that any variation in prediction and adaptation found across participants could not be explained by differences in the neuropsychological constructs tested here, it is clear to us that there still remains much more investigation to be done.read less
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