Coherent motion detection and letter position encoding

Coherent motion detection and letter position encoding 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Vision Research Elsevier

Coherent motion detection and letter position encoding

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Publisher
Elsevier
Copyright
Copyright © 1998 Elsevier Science Ltd
ISSN
0042-6989
eISSN
1878-5646
D.O.I.
10.1016/S0042-6989(98)00016-9
Publisher site
See Article on Publisher Site

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.

Journal

Vision ResearchElsevier

Published: Jul 1, 1998

References

  • Contrast sensitivity and coherent motion detection measured at photopic luminance levels in dyslexics and controls
    Cornelissen, PL; Richardson, AJ; Mason, AJ; Stein, JF
  • Magnocellular visual function and children's single word reading
    Cornelissen, PL; Hansen, PC; Hutton, JL; Evangelinou, V; Stein, JF
  • What children see affects how they read
    Cornelissen, PL; Bradley, L; Fowler, MS; Stein, JF
  • Transient visual attention is dominated by the magnocellular stream
    Steinman, BA; Steinman, SB; Lehmkuhle, S

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