UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Averaging, not internal noise, limits the development of coherent motion processing

Manning, C; Dakin, SC; Tibber, MS; Pellicano, E; (2014) Averaging, not internal noise, limits the development of coherent motion processing. Developmental Cognitive Neuroscience , 10 pp. 44-56. 10.1016/j.dcn.2014.07.004. Green open access

[img]
Preview
Text (Manning et al 2014)
Manning_et_al_2014.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview

Abstract

The development of motion processing is a critical part of visual development, allowing children to interact with moving objects and navigate within a dynamic environment. However, global motion processing, which requires pooling motion information across space, develops late, reaching adult-like levels only by mid-to-late childhood. The reasons underlying this protracted development are not yet fully understood. In this study, we sought to determine whether the development of motion coherence sensitivity is limited by internal noise (i.e., imprecision in estimating the directions of individual elements) and/or global pooling across local estimates. To this end, we presented equivalent noise direction discrimination tasks and motion coherence tasks at both slow (1.5°/s) and fast (6°/s) speeds to children aged 5, 7, 9 and 11 years, and adults. We show that, as children get older, their levels of internal noise reduce, and they are able to average across more local motion estimates. Regression analyses indicated, however, that age-related improvements in coherent motion perception are driven solely by improvements in averaging and not by reductions in internal noise. Our results suggest that the development of coherent motion sensitivity is primarily limited by developmental changes within brain regions involved in integrating motion signals (e.g., MT/V5).

Type: Article
Title: Averaging, not internal noise, limits the development of coherent motion processing
Location: Netherlands
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.dcn.2014.07.004
Publisher version: http://dx.doi.org/10.1016/j.dcn.2014.07.004
Language: English
Additional information: Copyright © 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).
Keywords: Direction discrimination, Motion processing, Visual development, Adult, Brain, Child, Female, Humans, Male, Motion Perception, Photic Stimulation, Time Factors
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Education
UCL > Provost and Vice Provost Offices > School of Education > UCL Institute of Education
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Clinical, Edu and Hlth Psychology
URI: https://discovery.ucl.ac.uk/id/eprint/1476117
Downloads since deposit
27Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item