Wider recognition in peripheral vision common to different subtypes of dyslexia.
Italian children (n = 125) were classified into dyslexics, poor readers and ordinary readers. The dyslexics were further classified into the Boder and Bakker subtypes. The children were tested with the form-resolving field (FRF), which measures central and peripheral visual recognition. Dyslexics show higher correct identification of letters in the periphery, supporting the notion of a different distribution of lateral masking. A numerical characterization of individual FRFs--C2R--reliably distinguishes between dyslexics and ordinary readers. The wider distribution of recognition, similar across the various subtypes of dyslexia, suggests a general characteristic of visual perception, and possibly a different visual-attentional mode.
Lorusso
M L
ML
Scientific Institute E. Medea, 23842 Bosisio Parini (LC), Italy. mluisa@bp.lnf.it
Facoetti
A
A
Pesenti
S
S
Cattaneo
C
C
Molteni
M
M
Geiger
G
G
D000293:Adolescent; D001288:Attention; D002648:Child; D004410:Dyslexia / Q000145:classification / Q000175:diagnosis / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual; D010470:Perceptual Masking; D011932:Reading; D021641:Recognition, Psychology; D014794:Visual Fields