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Single-trial dynamics explain magnitude sensitive decision making
Angelo Pirrone1,2,3,4, Wen Wen1,2,3,4, Sheng Li5,6,7,8
1School of Psychological and Cognitive Sciences, Peking University, Beijing, 100871, China.
BMC Neuroscience
|September 12, 2018
Summary
Magnitude sensitive reaction times are influenced by single-trial dynamics, challenging models that assume magnitude insensitivity at this level. This finding impacts our understanding of decision-making processes.
Area of Science:
- Cognitive Neuroscience
- Computational Neuroscience
- Decision Science
Background:
- Previous research and theoretical work suggest reaction times can be sensitive to stimulus magnitude.
- Magnitude sensitivity may stem from single-trial dynamics or from overall reward influencing decision boundary collapse.
Purpose of the Study:
- To review existing theoretical and empirical evidence on magnitude sensitivity in reaction times.
- To present new empirical evidence supporting magnitude sensitivity arising from single-trial dynamics.
Main Methods:
- Review of prior theoretical and empirical findings.
- Presentation of new empirical data investigating single-trial dynamics and reaction times.
Main Results:
- Evidence is presented for magnitude sensitivity originating from single-trial dynamics.
- This finding contradicts models where single-trial dynamics are magnitude insensitive.
Conclusions:
- The observed magnitude sensitive reaction times are incompatible with single-trial magnitude insensitive models.
- Statistically optimal drift diffusion models, as currently formulated, do not fully explain these results.
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