Can contrast sensitivity functions in dyslexia be explained by inattention rather than a magnocellular deficit?

Geoffrey W. Stuart*, Ken I. McAnally, Anne Castles

*Corresponding author for this work

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

We examined whether data demonstrating contrast sensitivity losses in dyslexia that have been interpreted as evidence for loss of magnocellular visual function could be explained by inattention. Computer simulations of observers with poor concentration yielded inflated estimates of threshold that were a constant proportion of the true threshold across spatial frequencies. Data from many, but not all, studies supporting the magnocellular deficit theory are well described by these simulations, which predicted no interaction between observer group and spatial frequency. Some studies have reported significant interactions, but suffer from statistical deficiencies. This compromises some of the evidence for a magnocellular deficit in dyslexia derived from studies of threshold contrast sensitivity.

Original languageEnglish
Pages (from-to)3205-3211
Number of pages7
JournalVision Research
Volume41
Issue number24
DOIs
Publication statusPublished - 2001

Fingerprint Dive into the research topics of 'Can contrast sensitivity functions in dyslexia be explained by inattention rather than a magnocellular deficit?'. Together they form a unique fingerprint.

Cite this