Letter identification and lateral masking in dyslexic and average readers  

Oleh:

King, Janine ; Goolkasian, Paula

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Psychology vol. 103 no. 4 (1990), page 519.
Topik: Dyslexic Reader; Average Reader; Letter Identification
Fulltext: 1423322.pdf (1.81MB)

Isi artikel

Lateral masking and letter identification in dyslexic and average readers were investigated with a methodology that corrected for some of the weaknesses of the Geiger and Lettvin studies (1986, 1987). Target letters were presented alone or embedded within three-letter arrays at retinal locations from 0? to 15' to the right or left of a fixation point. A foveal letter, which was the same as or different from a target letter, appeared as a distractor, and comparisons were made between scaled and unscaled stimuli. Dyslexic readers were found to be better than average readers at detecting scaled letters embedded in an array in some of the peripheral locations tested. Unlike the results of Geiger and Lettvin, however, this finding of better letter detection in the periphery by dyslexics was limited to selected conditions of the study. Reading groups were also found to differ in responding to the foveal distractor in the letter task. Detection of letters by average readers was affected by the type of distractor, but this variable was not found to influence the dyslexic readers. These findings suggest some differences between dyslexic and average readers in attention to stimuli presented at multiple locations in the visual field.

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