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A Method to Study Adaptation to Left-Right Reversed Audition

A Method to Study Adaptation to Left-Right Reversed Audition

Published on: October 29, 2018

Adaptation to direction statistics modulates perceptual discrimination.

Nicholas S C Price¹, Danielle L Prescott

¹Department of Physiology, Monash University, Clayton, Victoria, Australia. nicholas.price@monash.edu

Journal of Vision

|June 26, 2012

Summary

Rapidly adapting to motion stimuli can alter how we perceive direction. Selective adaptation to specific motion ranges can impair or improve our ability to discriminate directions, influencing sensory neuron activity.

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Area of Science:

Neuroscience
Perception Science
Computational Neuroscience

Background:

Perception relies on sensory neuron populations with adaptable tuning and response gains.
Neuronal tuning and gain can be modified by exposure to adapting stimuli.

Purpose of the Study:

To investigate how rapid adaptation to moving stimuli affects neuronal tuning and direction perception.
To determine if stimulus distributions during adaptation can selectively impair or enhance direction discrimination.

Main Methods:

Human psychophysical testing with a novel, rapidly changing motion stimulus (10 ms direction shifts).
Modeling neuronal population decoding to analyze adaptation effects.
Comparing adaptation to uniform, specific, and complementary direction ranges.

Main Results:

Adaptation to a distribution of directions modified human psychophysical direction discrimination.
Perceptual repulsion observed after single-direction adaptation.
Discrimination was impaired by adaptation to directions near the discrimination boundary and enhanced by complementary ranges.

Conclusions:

Stimulus distributions during adaptation can be strategically used to impair or improve discrimination performance.
Neuronal population decoding models with adaptation-induced tuning shifts explain most data.
Changes in neuronal gain alone are sufficient to account for all observed psychophysical data.