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The Joint Effect of Social Comparison and Social Distance on Evaluation of Intertemporal Choice Outcomes in Event-related Potential Studies
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Multiphasic value biases in fast-paced decisions.

Elaine A Corbett1,2,3, L Alexandra Martinez-Rodriguez3, Cian Judd1

  • 1Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland.

Elife
|February 13, 2023
PubMed
Summary
This summary is machine-generated.

Value biases in speeded decisions involve complex, multiphasic patterns. Early preparation favors high-value actions, while later preparation favors low-value actions, with detection further influencing choices.

Keywords:
decision makingelectroencephalographyhumanneurosciencesequential sampling models

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Decision Science

Background:

  • Perceptual decisions often favor higher-value options to maximize gains.
  • The dynamic neurophysiological processes underlying speeded decisions include anticipation, detection, and discrimination.
  • How value biases manifest across these distinct phases of decision-making is not well understood.

Purpose of the Study:

  • To investigate the temporal dynamics of value biases during speeded perceptual decision-making.
  • To elucidate the neurophysiological mechanisms underlying these value-biased decisions.
  • To model the interplay of different biasing mechanisms in time-constrained choices.

Main Methods:

  • Analysis of motor preparation dynamics using human electrophysiology.
  • Behavioral data collection for speeded decision tasks.
  • Development and application of a neurally-constrained process model.

Main Results:

  • A multiphasic pattern of opposing value biases was identified in motor preparation.
  • Higher-value actions exhibited earlier anticipatory preparation, providing a starting advantage.
  • Lower-value actions showed steeper preparation, countered by a stimulus-evoked deflection toward higher value.
  • A computational model successfully replicated observed behaviors and preparation dynamics.

Conclusions:

  • Speeded perceptual decisions are governed by an intricate interplay of distinct biasing mechanisms.
  • These mechanisms include anticipatory urgency, biased stimulus detection, and evidence accumulation.
  • This complex system prioritizes value-based choices within strict time constraints.