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Related Experiment Video

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Training Synesthetic Letter-color Associations by Reading in Color

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Chromatic Perceptual Learning but No Category Effects without Linguistic Input.

Alexandra Grandison¹, Paul T Sowden¹, Vicky G Drivonikou¹

¹School of Psychology, University of Surrey Guildford, UK.

Frontiers in Psychology

|June 3, 2016

Summary

Chromatic perceptual learning improves visual judgment with practice, showing specificity to stimulus and task factors. Category training enhances some tasks but not low-level ones, suggesting category effects emerge at higher processing levels.

Keywords:

categorical perception color lateralization perceptual learning plasticity

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Area of Science:

Visual perception
Cognitive psychology
Neuroscience

Background:

Perceptual learning enhances judgment with practice, often task-specific.
Research on chromatic perceptual learning is limited.
Understanding category specificity in visual learning is crucial.

Purpose of the Study:

To investigate chromatic perceptual learning using threshold and supra-threshold tasks.
To assess category effects and specificity in chromatic visual learning.
To explore the neural basis of learned category effects.

Main Methods:

Utilized two low-level perceptual threshold tasks and one supra-threshold target detection task.
Employed category training to assess its impact on chromatic thresholds and category effects.
Investigated learning transfer across retinal location and hue, and lateralized target detection.

Main Results:

Chromatic thresholds improved with training, but learning was specific to retinal location and hue.
Category training did not induce category effects on low-level tasks.
Category training induced emerging category effects on a supra-threshold task, linked to left hemisphere processing.

Conclusions:

Chromatic perceptual learning is possible and can occur at early visual processing stages.
Learned category effects are specific and may require higher-level cognitive processes.
Left hemisphere processing and linguistic input appear necessary for manifesting learned category effects.