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Related Experiment Videos

Is there a mismatch negativity during change blindness?

Ross M Henderson1, Harry S Orbach

  • 1Department of Vision Sciences, Glasgow Caledonian University, Glasgow, Scotland, UK.

Neuroreport
|June 23, 2006
PubMed
Summary

Mismatch negativity, an indicator of preattentive change detection, was investigated during change blindness. This neural response was absent when participants were

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Neuroscience

Background:

  • Mismatch negativity (MMN) is an event-related potential reflecting preattentive change detection.
  • Change blindness describes the failure to notice large visual scene changes during blinks or eye movements.
  • The relationship between MMN and change blindness in complex visual environments remains unclear.

Purpose of the Study:

  • To investigate the presence of mismatch negativity during change blindness.
  • To determine if preattentive change detection mechanisms are active during periods of unawareness to significant visual alterations.

Main Methods:

  • Participants viewed complex scenes with large orientation changes.
  • Event-related potentials, specifically mismatch negativity, were recorded.
  • Performance was assessed in cued and miscued conditions to evaluate change blindness.

Main Results:

  • A candidate mismatch negativity was observed between 180 and 320 ms in response to orientation changes, independent of performance in the uncued condition.
  • This mismatch negativity disappeared in the miscued 'change blind' condition.
  • Performance accuracy was 76% correct in the uncued condition and 59% correct in the miscued condition (chance at 50%).

Conclusions:

  • Mismatch negativity appears to be absent during change blindness.
  • This suggests that significant changes in complex scenes may not always engage preattentive change detection processes when change blindness occurs.
  • Preattentive change detection may be suppressed or bypassed under conditions of inattentiveness.

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