Electrophysiological correlates of change detection

Psychophysiology. 2005 May;42(3):328-42. doi: 10.1111/j.1469-8986.2005.00285.x.


To identify electrophysiological correlates of change detection, event-related brain potentials (ERPs) were recorded while participants monitored displays containing four faces in order to detect a face identity change across successive displays. Successful change detection was mirrored by an N2pc component at posterior electrodes contralateral to the side of a change, suggesting close links between conscious change detection and attention. ERPs on undetected-change trials differed from detected-change and no-change trials. We suggest that short-latency ERP differences between these trial types reflect trial-by-trial fluctuations in advance task preparation, whereas differences in the P3 time range are due to variations in the duration of perceptual and decision-related processing. Overall, these findings demonstrate that ERPs are a useful tool for dissociating processes underlying change blindness and change detection.

Publication types

  • Clinical Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Contingent Negative Variation
  • Electroencephalography
  • Electrophysiology
  • Evoked Potentials, Visual / physiology
  • Female
  • Humans
  • Male
  • Psychomotor Performance / physiology
  • Visual Perception / physiology*