Specificity and generalization of perceptual learning in low myopia

Casco, Clara and Guzzon, Daniela and Moise, Monica and Vecchies, Antonella and Testa, Tiziano and Pavan, Andrea (2014) Specificity and generalization of perceptual learning in low myopia. Restorative Neurology and Neuroscience, 32 (5). pp. 639-653. ISSN 0922-6028

Full content URL: http://dx.doi.org/10.3233/RNN-140389

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Item Type:Article
Item Status:Live Archive

Abstract

PURPOSE

In this study we investigated in observers with low myopia: (i) the pattern of lateral interactions between stimuli activating early cortical analyzers and its modulation by perceptual learning (PL), and (ii) whether PL transferred to untrained stimuli and tasks and whether it exhibits interocular transfer.

METHOD

Participants (seven adults with low myopia) performed 12 training sessions. Participants were trained on a contrast detection task of a central Gabor target flanked by two co-oriented and co-aligned high contrast Gabor patches. Target-to-flankers separation along the vertical axis was varied from 2 wavelengths (λ) to 8λ.

RESULTS

The results showed that before PL facilitatory lateral interactions in the myopic eye were reduced in strength, but PL increased contrast sensitivity and improved facilitatory lateral interactions. However, PL did not transfer to different local/global orientations and lower spatial frequencies. On the other hand, PL resulted in an enhancement of the contrast sensitivity function (CSF) and of the uncorrected visual acuity (UCVA) both in the trained and untrained eye.

CONCLUSIONS

Such improvements seem to be associated to a modulation of lateral interactions between target and flankers and it is likely to take place at a level in which the inputs from the two eyes converge.

Keywords:Perceptual learning in low myopia, NotOAChecked
Subjects:C Biological Sciences > C810 Applied Psychology
Divisions:College of Social Science > School of Psychology
ID Code:16311
Deposited On:20 Dec 2014 22:28

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