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Speech recognition and dysarthria: a single subject study of two individuals with profound impairment of speech and motor control.

Journal article
Authors Christina Havstam
Margret Buchholz
Lena Hartelius
Published in Logopedics, phoniatrics, vocology
Volume 28
Issue 2
Pages 81-90
ISSN 1401-5439
Publication year 2003
Published at Institute of Occupational Therapy and Physiotherapy
Institute of Selected Clinical Sciences, Department of Logopedics and Phoniatrics
Pages 81-90
Language en
Keywords Adult, Cerebral Palsy, complications, Child, Communication Aids for Disabled, Dysarthria, etiology, rehabilitation, Humans, Male, Research Design, Speech Perception, User-Computer Interface, Voice
Subject categories Logopedics and phoniatrics


This study investigated the use of the speech recognition system Dragon Dictate as an augmentative method of computer access for two individuals with cerebral palsy, including severe motor dysfunction and dysarthria. Single subject design was used and measures of computer access system effectiveness and speech production were used before, during and after intervention. The users' original switch access system was compared to a combination of their switch access system and speech recognition, by counting the number of correct entries. Adding speech recognition increased the number of correct entries by 40% for one of the participants. The other participant did not complete the intervention protocol. An independent judge rated speech production. No changes in speech were observed. Dragon Dictate is time-consuming to learn and demands a high level of motivation, but can be beneficial to a person who has profound dysarthria and great difficulties in accessing the computer.

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