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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 500 ms 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.

Item Type:	Refereed Article
Keywords:	dyslexia, phonological decoding, reading, flanker effect, cue-size effect, spatial attention, ERPs, N1, N2
Research Division:	Psychology
Research Group:	Biological psychology
Research Field:	Behavioural neuroscience
Objective Division:	Expanding Knowledge
Objective Group:	Expanding knowledge
Objective Field:	Expanding knowledge in psychology
UTAS Author:	Matthews, AJ (Dr Allison Matthews)
UTAS Author:	Martin, FH (Associate Professor Frances Martin)
ID Code:	104338
Year Published:	2015
Web of Science® Times Cited:	4
Deposited By:	Psychology
Deposited On:	2015-11-10
Last Modified:	2017-11-29
Downloads:	101 View Download Statistics