2020
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John D. Bonvillian et al., « 9. Application and Use of the Simplified Sign System with Persons with Disabilities », Open Book Publishers
In the last several decades, both clinical and research evidence have shown that individuals who cannot effectively use or understand speech (including persons with autism spectrum disorder, an intellectual disability, cerebral palsy, or aphasia) may be able to produce or understand visual-motor symbols such as manual signs. However, to obtain the best results for these persons, it is not sufficient to merely start using signs with them. One must adopt good practices concerning which signs to teach...