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Assessment of Mouse Judgment Bias through an Olfactory Digging Task

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Modeling accuracy, response time, and bias in continuous orientation judgments.

¹Department of Psychological & Brain Sciences.

Journal of Experimental Psychology. Human Perception and Performance

|February 5, 2019

Summary

This study models complex decision-making beyond simple choices, revealing how stimulus difficulty and time pressure affect continuous judgments. A new bias model explains response patterns, including bimodal distributions, in perceptual tasks.

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Area of Science:

Cognitive Psychology
Computational Neuroscience
Decision Science

Background:

Traditional cognitive models often simplify decision-making to choices among few options.
Gaps exist in understanding decisions with many alternatives or continuous responses.

Purpose of the Study:

To model decision processes in continuous perceptual judgments.
To extend cognitive models to account for complex bias effects.

Main Methods:

Participants performed continuous orientation judgments under varying stimulus difficulty and time pressure.
The circular diffusion model was applied and extended.
A novel bias theory involving split attention and racing diffusion processes was developed.

Main Results:

Stimulus difficulty and time pressure influenced response time and accuracy similarly to binary choices.
The circular diffusion model explained initial findings.
A new model was required to explain bimodal response distributions caused by predecision cues.

Conclusions:

Cognitive models need to accommodate decisions with numerous options and continuous outcomes.
A split-attention, racing diffusion model successfully explains bias effects in continuous perceptual tasks.
This research advances understanding of evidence accumulation and decision-making under bias.