Temporal Modified Speech Perception in Dyslexia

The phonological or the auditory hypotheses are the two main views still debated to explain nature and origin of dyslexia. In the experiments presented we investigated the auditory temporal processing deficit in dyslexic adults. By timecompression of rapid acoustic cues, we explored their capacities of extraction and analyze of this acoustic features (voice onset-time and second formant transition). Moreover, we evaluated their abilities to reconstruct a degraded speech signal. Compared with controls, dyslexics exhibit deficit in time-compressed speech perception, the impairment is stronger for voicing feature than place of articulation. The temporal information would be inefficiently extracted and analyzed by dyslexics.