Bennett, Duke & Fuggetta, 2014.pdf (625.52 kB)
Download file

Event-related potential N270 delayed and enhanced by the conjunction of relevant and irrelevant perceptual mismatch

Download (625.52 kB)
journal contribution
posted on 11.05.2016, 15:14 by Matthew A. Bennett, Philip A. Duke, Giorgio Fuggetta
Event-related potential studies using delayed match-to-sample tasks have demonstrated the presence of two components, N270 and N400, possibly reflecting the sequential processing of multiple sources of endogenous mismatch. To date, studies have only investigated mismatch between a single cue and target. In this study, we used distractor stimuli to investigate the effect of a secondary source of mismatch distinct from the task-relevant stimulus. Subjects performed two paradigms in which the cue and target could match or mismatch. In one paradigm, task-irrelevant distractors were added--producing a source of task-irrelevant perceptual mismatch. A mismatch-triggered negativity was elicited in both paradigms, but was delayed and enhanced in magnitude in the distractors present paradigm. It is suggested that the distractors may differentially affect mismatch responses through the generation of a task-irrelevant mismatch response.

History

Citation

Psychophysiology, 2014, 51 (5), pp. 456-463

Author affiliation

/Organisation/COLLEGE OF MEDICINE, BIOLOGICAL SCIENCES AND PSYCHOLOGY/MBSP Non-Medical Departments/Neuroscience, Psychology and Behaviour

Version

AM (Accepted Manuscript)

Published in

Psychophysiology

Publisher

Wiley on behalf of Society for Psychophysiological Research

issn

0048-5772

eissn

1540-5958

Copyright date

2014

Available date

11/05/2016

Publisher version

http://onlinelibrary.wiley.com/doi/10.1111/psyp.12192/abstract

Language

en