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Temporal integration is a robust feature of perceptual decisions
Alexandre Hyafil1,2, Jaime de la Rocha3, Cristina Pericas3
1Centre de Recerca Matemàtica, Bellaterra, Spain.
Elife
|May 4, 2023
Summary
Perceptual decision-making in mammals relies on integrating sensory evidence over time. This study confirms temporal integration is a common strategy across species and tasks, refuting alternative models.
Area of Science:
- Neuroscience
- Cognitive Science
- Decision Science
Background:
- Informed decisions in noisy environments depend on integrating sensory information over time.
- Distinguishing evidence integration from non-integration strategies (e.g., extrema-detection, random snapshots) is challenging.
- Non-integration strategies may be prevalent in experiments studying decision-making.
Purpose of the Study:
- To develop and apply a model-based approach to differentiate temporal integration from non-integration strategies.
- To investigate the centrality of temporal integration in perceptual decision-making across species.
Main Methods:
- Developed a novel model-based approach to compare integration vs. non-integration models.
- Applied the approach to behavioral data from monkeys, rats, and humans in sensory decision-making tasks.
- Analyzed psychometric curves, psychophysical kernels, and the contribution of individual evidence samples.
Main Results:
- The integration model provided a better account of behavioral statistics across all species and tasks.
- Evidence did not disproportionately come from extreme sensory samples, ruling out extrema-detection.
- Both early and late sensory evidence samples demonstrably contributed to decisions, confirming temporal integration.
Conclusions:
- Temporal integration is a ubiquitous feature of perceptual decision-making in mammals.
- The study validates the use of controlled experimental paradigms to precisely characterize decision-making processes.
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