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Related Experiment Video

Updated: Nov 14, 2025

An Operant Intra-/Extra-dimensional Set-shift Task for Mice

An Operant Intra-/Extra-dimensional Set-shift Task for Mice

Published on: January 22, 2016

Learning complex texture discrimination.

T Maddess, D Coy, J C Herrington

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|March 10, 2021

Summary

This summary is machine-generated.

Longer-term training significantly improved the ability to discriminate complex visual textures defined by higher-order spatial correlations. These perceptual learning gains were retained for months, suggesting adaptation of innate visual mechanisms.

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Area of Science:

Visual perception
Neuroscience
Psychology

Background:

Higher-order spatial correlations are crucial for visual structure and salience in natural environments.
Controlled texture patterns defined by these correlations are used to study visual processing.

Purpose of the Study:

To investigate the effects of extended training on the discrimination of complex visual textures.
To understand the underlying mechanisms and retention of perceptual learning.

Main Methods:

Participants underwent 14 training sessions over 42 days to discriminate 17 texture types.
Factor analysis was used to analyze discrimination data from learning and experienced phases.
Performance metrics included discrimination accuracy and time to complete tasks.

Main Results:

Discrimination performance improved at varying rates across different textures.
Task completion time decreased by 25.4% (p=0.0004), indicating increased speed.
Learning was robust, unaffected by sleep quality but impacted by extreme tiredness.
Improved performance was retained for at least 2.5 months.

Conclusions:

The observed improvements are consistent with perceptual learning, likely involving adaptation of innate mechanisms for identifying salient natural image structures.
Learning may involve cortical V2 and is associated with enhanced neural connections.
This study highlights the brain's capacity for long-term adaptation in complex visual discrimination.