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Training-induced recovery of low-level vision followed by mid-level perceptual improvements in developmental object and face agnosia

Lev, Maria, Gilaie-Dotan, Sharon, Gotthilf-Nezri, Dana, Yehezkel, Oren, Brooks, Joseph L, Perry, Anat, Bentin, Shlomo, Bonneh, Yoram, Polat, Uri (2015) Training-induced recovery of low-level vision followed by mid-level perceptual improvements in developmental object and face agnosia. Developmental Science, 18 (1). pp. 50-64. ISSN 1363-755X. (doi:10.1111/desc.12178)

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Abstract

Long-term deprivation of normal visual inputs can cause perceptual impairments at various levels of visual function, from basic visual acuity deficits, through mid-level deficits as contour integration and motion coherence, to high-level face and object agnosia. Yet it is unclear whether training during adulthood, at a post-developmental stage of the adult visual system can overcome such developmental impairments. Here, we visually trained LG, a developmental object and face agnosic individual. Prior to training, at the age of 20, LG’s basic and mid-level visual functions such as visual acuity, crowding effects, and contour integration were underdeveloped relative to normal adult vision, corresponding to those of 5-6 year olds (Gilaie-Dotan, Perry, Bonneh, Malach, & Bentin, 2009). Intensive visual training, based on lateral interactions, was applied for a period of nine months. LG’s directly trained but also untrained visual functions such as visual acuity, crowding, binocular stereopsis and also mid-level contour integration improved significantly and reached near-age-level performance, with long-term (over 4 years) persistence. Moreover, mid-level functions that were tested post-training were found normal in LG. Some possible subtle improvement was observed in LG’s higher order visual functions such as object recognition and part integration, while LG’s face perception skills have not improved thus far. These results suggest that corrective training at a post-developmental stage, even in the adult visual system, can prove effective, and its enduring effects are the basis for a revival of a developmental cascade that can lead to reduced perceptual impairments.

Item Type: Article
DOI/Identification number: 10.1111/desc.12178
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculties > Social Sciences > School of Psychology
Faculties > Social Sciences > School of Psychology > Cognitive Psychology
Depositing User: J. Brooks
Date Deposited: 11 Dec 2013 11:17 UTC
Last Modified: 29 May 2019 11:39 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/37494 (The current URI for this page, for reference purposes)
Brooks, Joseph L: https://orcid.org/0000-0002-5364-3611
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