Crossmodal Temporal Order and Processing Acuity in Developmentally Dyslexic Young Adults  

Oleh:

Laasonen, Marja ; Service, Elisabet ; Virsu, Veijo

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 80 no. 3 (2002), page 340-354.
Topik: developmental dyslexia; temporal order judgment; temporal processing; crossmodal; visual; auditory; tactile
Fulltext: 80_03_Laasonen.pdf (209.27KB)

Isi artikel

We investigated crossmodal temporal performance in processing rapid sequential nonlinguistic events in developmentally dyslexic young adults (ages 20–36 years) and an age- and IQ-matched control group in audiotactile, visuotactile, and audiovisual combinations. Two methods were used for estimating 84% correct temporal acuity thresholds: temporal order judgment (TOJ) and temporal processing acuity (TPA). TPA requires phase difference detection: the judgment of simultaneity/nonsimultaneity of brief stimuli in two parallel, spatially separate triplets. The dyslexic readers’ average temporal performance was somewhat poorer in all six comparisons; in audiovisual comparisons the group differences were not statistically significant, however. A principal component analysis indicated that temporal acuity and phonological awareness are related in dyslexic readers. The impairment of temporal input processing seems to be a general correlative feature of dyslexia in children and adults, but the overlap in performance between dyslexic and normal readers suggests that it is not a sufficient reason for developmental reading difficulties.

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