August 2016
Volume 16, Issue 12
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2016
Typical development of Motion perception and Form discrimination abilities in children
Author Affiliations
  • Luca Mandolesi
    Department of Psychology, University of Bologna
  • Kerstin Hellgren
    Department of Clinical Neuroscience, Karolinska Institutet
  • Sara Giovagnoli
    Department of Psychology, University of Bologna
  • Tony Pansell
    Department of Clinical Neuroscience, Karolinska Institutet
  • Mariagrazia Benassi
    Department of Psychology, University of Bologna
Journal of Vision September 2016, Vol.16, 187. doi:10.1167/16.12.187
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      Luca Mandolesi, Kerstin Hellgren, Sara Giovagnoli, Tony Pansell, Mariagrazia Benassi; Typical development of Motion perception and Form discrimination abilities in children. Journal of Vision 2016;16(12):187. doi: 10.1167/16.12.187.

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      © 2017 Association for Research in Vision and Ophthalmology.

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Abstract

Visual functions have been widely investigated in patients with developmental disorders. This study aims to analyze the development of dorsal and ventral visual function in children with typical development, measured as motion and form discrimination abilities. A sample of 304 children (age: 4-12 years; 154 males) participated in the experiment. Non-verbal intelligence (Raven's matrices), visual acuity (Lea test), motion perception (motion coherence test-MCT) and form recognition (form coherence test-FCT) were assessed. The MCT consists of 150 white dots on a black background moving coherently at a constant velocity in one of the eight directions (signal) or in a Brownian manner (noise). The task was to recognize the direction of the signal dots. The FCT consists of white dots (signal) composing one of eight possible forms through spatial alignment of the dots, the noise was created by non-aligned dots distorting the form. The task was to recognize the form. Difficulty was increased by reducing the dot coherence (signal/noise) from 100% (no noise) to 36% in five levels. MANOVA showed a significant increment of motion and form perception accuracy with age, steeper for form as compared to motion recognition. Both functions are influenced by noise but motion discrimination seemed to be less affected. While noise had a stronger effect on the younger children in the FCT (worse performance with noise in the youngest) no such age effect was found in MCT. Motion and form perception are related to general intelligence at different ages as well as to the visual acuity. These results confirm the slowness in development of dorsal function as compared to ventral function. Visuo-spatial attention, general intelligence and visual acuity mediate the visual functionality development.

Meeting abstract presented at VSS 2016

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