Dynamics of chromatic visual system processing differ in complexity between children and adults

Mei Ying Boon, Catherine M. Suttle, Bruce I. Henry, Stephen J. Dain

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Measures of chromatic contrast sensitivity in children are lower than those of adults. This may be related to immaturities in signal processing at or near threshold. We have found that children's VEPs in response to low contrast supra-threshold chromatic stimuli are more intra-individually variable than those recorded from adults. Here, we report on linear and nonlinear analyses of chromatic VEPs recorded from children and adults. Two measures of signal-to-noise ratio are similar between the adults and children, suggesting that relatively high noise is unlikely to account for the poor clarity of negative and positive peak components in the children's VEPs. Nonlinear analysis indicates higher complexity of adults' than children's chromatic VEPs, at levels of chromatic contrast around and well above threshold.

Original languageEnglish
Article number22
Pages (from-to)1-17
Number of pages17
JournalJournal of Vision
Volume9
Issue number6
DOIs
Publication statusPublished - 30 Jun 2009
Externally publishedYes

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