Mental Rotation of Letters and Shapes in Developmental Dyslexia

Author:

Rusiak Patrycja12,Lachmann Thomas34,Jaskowski Piotr56,van Leeuwen Cees4

Affiliation:

1. Department of Psychophysiology, Kazimierz Wielki University, PL 85-837 Bydgoszcz, Poland

2. Department of Psychology, University of Leipzig, D 04009 Leipzig, Germany

3. Department of Psychology, University of Bamberg, Markusplatz 3, D 96045 Bamberg, Germany

4. Laboratory for Perceptual Dynamics, Brain Science Institute, Riken, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan

5. Department of Neurology, University of Lübeck, D 23538 Lübeck, Germany

6. Department of Psychology, University of Finance and Management, Pawia 55, PL 01030 Warsaw, Poland

Abstract

Extending the work of Corballis et al (1985, Cortex 21 225–236), we investigated mental rotation of letters (experiment 1), and of letters and shapes (experiment 2) in normal readers and developmental dyslexics. Whereas the overall response times were equal for shapes in both groups, for letters they were slower in dyslexics. For letters as well as for shapes, however, the same mental-rotation effects were obtained between the groups. The results are interpreted as support for the notion of developmental dyslexia as a deficit in functional coordination between graphemic and phonological letter representations.

Publisher

SAGE Publications

Subject

Artificial Intelligence,Sensory Systems,Experimental and Cognitive Psychology,Ophthalmology

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