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Claudia Wilimzig1, Naotsugu Tsuchiya, Manfred Fahle

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Summary

Selective attention improves accuracy and processing speed, but not necessarily confidence. This study shows attention and awareness are distinct phenomena, impacting performance independently.

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Selective attention enhances task performance, often linked to increased response confidence.
  • The precise relationship between attention, processing speed, accuracy, and subjective confidence remains debated.

Purpose of the Study:

  • To investigate whether faster reaction times due to attention reflect genuine processing speed improvements or merely a shift towards more confident responses.
  • To determine the independent effects of spatial attention on accuracy, processing speed, and subjective confidence.

Main Methods:

  • A visual orientation discrimination task was employed.
  • Two distinct spatial attention manipulations were utilized to probe attentional effects.
  • Objective performance metrics (accuracy, reaction time) and subjective confidence ratings were recorded.

Main Results:

  • Spatial attention significantly enhanced accuracy in the visual task.
  • Subjective confidence ratings were higher for non-attended stimuli, indicating overconfidence.
  • When confidence levels were held constant, reaction times decreased significantly (15-49%) with attention.

Conclusions:

  • Attention and awareness, as indicated by confidence, are dissociable phenomena.
  • Attentional benefits to performance are not solely explained by increased subjective confidence.
  • Spatial attention independently modulates objective performance (accuracy, speed) and subjective confidence.