MMN and attention: Competition for deviance detection

Elyse Sussman, István Winkler, Wenjung Wang

Research output: Contribution to journalArticle

94 Scopus citations

Abstract

We addressed the question of whether the mismatch negativity (MMN) event-related potential reflects an attentionindependent process. Previous studies have shown that the MMN response to intensity deviation was significantly reduced or even abolished when attention was highly focused on a concurrent sound channel, whereas no conclusive evidence of attentional sensitivity has been obtained for frequency deviation. We tested a new hypothesis suggesting that competition between detection of identical deviations in attended and unattended channels and the biasing of this competition induced by the subject's task account for the observed MMN effects. In a fast-paced dichotic paradigm, we set up competition for frequency MMN and removed it for intensity MMN. We found that frequency MMN was now abolished in the unattended channel, whereas the amplitude of the intensity MMN was unaffected. These results support the competition hypothesis and suggest that selective attention in and of itself does not affect the MMN. Topdown processes can determine what information reaches the deviance-detection process when changes in multiple channels vie for the same MMN resource and one of the competing changes is relevant for the subject's task.

Original languageEnglish (US)
Pages (from-to)430-435
Number of pages6
JournalPsychophysiology
Volume40
Issue number3
DOIs
StatePublished - May 2003

Keywords

  • Attention
  • Competition
  • Deviance detection
  • ERP
  • MMN
  • Mismatch negativity

ASJC Scopus subject areas

  • Neuroscience(all)
  • Neuropsychology and Physiological Psychology
  • Experimental and Cognitive Psychology
  • Neurology
  • Endocrine and Autonomic Systems
  • Developmental Neuroscience
  • Cognitive Neuroscience
  • Biological Psychiatry

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