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Area of Science:

  • Cognitive Neuroscience
  • Social Neuroscience
  • Psychology

Background:

  • Mind wandering (MW) involves a shift of attention from external tasks to internal thoughts.
  • Perceptual decoupling, a proposed mechanism of MW, suggests reduced processing of external stimuli.
  • Previous research on perceptual decoupling primarily used simple stimuli, leaving its effect on complex, real-world stimuli unclear.

Purpose of the Study:

  • To investigate the impact of mind wandering on behavioral and neural responses to complex visual stimuli, specifically faces.
  • To determine if perceptual decoupling occurs during MW when processing socially relevant stimuli.

Main Methods:

  • A novel sustained attention to response task using upright and inverted faces was developed.
  • Thirty-six participants performed the task and intermittently reported their task engagement (On task/Off task).
  • Behavioral data (response variability) and event-related potentials (ERPs), focusing on N170, P1, and P3 components, were analyzed.

Main Results:

  • Behavioral analysis showed increased response variability for non-target (upright) faces when participants reported being 'Off task' versus 'On task'.
  • ERP analysis revealed significantly attenuated N170 amplitudes to non-target faces preceding 'Off task' periods compared to 'On task' periods.
  • No significant differences in P1 or P3 amplitudes were observed between 'On task' and 'Off task' conditions.

Conclusions:

  • The findings suggest that mind wandering leads to decoupled visual processing of faces.
  • This perceptual decoupling impacts the early neural processing stages of face recognition (N170).
  • These results have significant implications for understanding social cognition and attention during mind wandering.