Coherent motion detection and letter position encoding

P.L. Cornelissen, P.C. Hansen, I.D. Gilchrist, F. Cormack, J. Essex, C. Frankish

Research output: Contribution to journalArticlepeer-review

99 Citations (Scopus)

Abstract

We identified 24 ‘good’ and 24 ‘poor’ coherent motion detectors from an unselected sample of young adults. The two groups were matched for reading ability, age and IQ. All subjects carried out two tasks in which optimal performance depended on accurate letter position encoding: a lexical decision task and a primed reaction time task. We found that accurate letter position encoding was predicted by performance in the motion detection task. Since coherent motion detection depends on input from the magnocellular pathway, these findings suggest that information carried by the magnocellular system may be required for encoding letter position. Furthermore, these results may have implications for reading disability which is said to be associated with magnocellular dysfunction.
Original languageEnglish
Pages (from-to)2181-2191
Number of pages11
JournalVision Research
Volume39
Issue number2
Early online date6 Jul 1998
DOIs
Publication statusPublished - Jul 1998
Externally publishedYes

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