The development of speed discrimination abilities

Catherine Manning*, David Aagten-Murphy, Elizabeth Pellicano

*Corresponding author for this work

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The processing of speed is a critical part of a child's visual development, allowing children to track and interact with moving objects. Despite such importance, no study has investigated the developmental trajectory of speed discrimination abilities or precisely when these abilities become adult-like. Here, we measured speed discrimination thresholds in 5-, 7-, 9-, 11-year-olds and adults using random dot stimuli with two different reference speeds (slow: 1.5. deg/s; fast: 6. deg/s). Sensitivity for both reference speeds improved exponentially with age and, at all ages, participants were more sensitive to the faster reference speed. However, sensitivity to slow speeds followed a more protracted developmental trajectory than that for faster speeds. Furthermore, sensitivity to the faster reference speed reached adult-like levels by 11. years, whereas sensitivity to the slower reference speed was not yet adult-like by this age. Different developmental trajectories may reflect distinct systems for processing fast and slow speeds. The reasonably late development of speed processing abilities may be due to inherent limits in the integration of neuronal responses in motion-sensitive areas in early childhood.

Original languageEnglish
Pages (from-to)27-33
Number of pages7
JournalVision Research
Volume70
DOIs
Publication statusPublished - 1 Oct 2012
Externally publishedYes

Keywords

  • speed discrimination
  • motion processing
  • visual development
  • psychophysics

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