Spatial attention and reading ability: ERP correlates of flanker and cue-size effects in good and poor adult phonological decoders.

Brain Lang

Division of Psychology, School of Medicine, University of Tasmania, Private Bag 30, Hobart, TAS 7000, Australia; School of Psychology, The University of Newcastle, Ourimbah, NSW 2258, Australia.

Published: December 2015

To investigate facilitatory and inhibitory processes during selective attention among adults with good (n=17) and poor (n=14) phonological decoding skills, a go/nogo flanker task was completed while EEG was recorded. Participants responded to a middle target letter flanked by compatible or incompatible flankers. The target was surrounded by a small or large circular cue which was presented simultaneously or 500ms prior. Poor decoders showed a greater RT cost for incompatible stimuli preceded by large cues and less RT benefit for compatible stimuli. Poor decoders also showed reduced modulation of ERPs by cue-size at left hemisphere posterior sites (N1) and by flanker compatibility at right hemisphere posterior sites (N1) and frontal sites (N2), consistent with processing differences in fronto-parietal attention networks. These findings have potential implications for understanding the relationship between spatial attention and phonological decoding in dyslexia.

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http://dx.doi.org/10.1016/j.bandl.2015.10.008DOI Listing

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