What is learned when learning to point at "invisible" targets?

Arnold, Derek H. and Yuen, Vivien (2016) What is learned when learning to point at "invisible" targets?. Journal of Vision, 16 15: . doi:10.1167/16.15.9

Author Arnold, Derek H.
Yuen, Vivien
Title What is learned when learning to point at "invisible" targets?
Journal name Journal of Vision   Check publisher's open access policy
ISSN 1534-7362
Publication date 2016-12-01
Year available 2016
Sub-type Article (original research)
DOI 10.1167/16.15.9
Open Access Status DOI
Volume 16
Issue 15
Total pages 9
Place of publication Rockville, MD United States
Publisher Association for Research in Vision and Ophthalmology
Language eng
Abstract Binocular masking is a particularly interesting means of suppressing human visual awareness, as images rendered subjectively “invisible” via binocular masking nonetheless excite robust activity in human visual cortex. Recently, binocular masking has been leveraged to show that people can be trained to better interact with inputs that, subjectively, remain invisible. Here we ask what is learned in such circumstances. Do people become more adept at using weak encoded signals to guide hand movements, or is signal encoding enhanced, resulting in heightened objective sensitivity? To assess these possibilities, we had people train on five consecutive days, to reach toward and point at a target presented in one of three masked locations. Target intensity was set to a fraction of a detection threshold determined pretraining for each participant. We found that people became better at selecting the target location with training, even when insisting they could not see the target. More important, posttraining we found objective thresholds had improved by an amount that was commensurate with an improvement in subjective visibility. Our data therefore show that training to coordinate with subjectively invisible targets can result in enhanced encodings of binocularly masked images.
Keyword Binocular masking
Continuous flash suppression
Perceptual learning
Visual awareness
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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