J. Light

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In this article the authors discuss the use of augmentative and alternative communication (AAC) as used to enhance comprehension and expression of people with autism. A theoretical model for AAC assessment and intervention planning is presented. Application of the model is illustrated through a case report of a 6-year-old boy with autism who had severe(More)
This study evaluated the communicative interaction skills of seven young men (ages 19-23 years) who had used AAC systems for at least 15 years. Turn-taking patterns, use of communicative functions, and linguistic complexity were analyzed. Current performance was compared to the participants' skills when they were preschoolers and participated in another(More)
A research review of 31 studies pertaining to the morphology and syntax of individuals who use augmentative and alternative communication (AAC) and who had severe speech and physical impairments (SSPI) was completed. Results suggest that, although many individuals who use AAC exhibit comprehension and expression of a wide range of grammatical structures,(More)
This study investigated the cognitive and linguistic processing demands of message-encoding techniques used to retrieve prestored messages from computer-based augmentative communication systems. Twelve physically disabled adults with severe speech impairments participated in six counterbalanced experimental conditions, consisting of three encoding(More)
Children with severe motor impairments who cannot use direct selection are typically introduced to scanning as a means of accessing assistive technology. Unfortunately, it is difficult for young children to learn to scan because the design of current scanning techniques does not always make explicit the offer of items from the selection array; furthermore,(More)
  • R B Lehoucq, S K Gray, D.-H Zhang, J C Light
  • 1997
We present an approach for determining the vibrational eigenstates of four-atom molecules. The primary representation of the (six-dimensional) eigenstates involves a nite basis or quantum number representation, whereas Hamiltonian matrix-vector products are evaluated with the aid of certain grid or discrete variable representations. This approach leads to(More)
Seven parents of individuals with cerebral palsy who used augmentative and alternative communication (AAC) devices participated in a focus group discussion on the benefits and challenges of learning AAC technology. The focus group was conducted on the Internet over a 9-week period. Six major themes emerged from the discussion: (a) issues in the selection of(More)
A single-subject, multiple-probe experimental design was used to investigate the effect of instruction on the acquisition, generalization, and long-term maintenance of partner-focused questions (i.e., questions about communication partners and their experiences) by individuals who use augmentative and alternative communication (AAC). Six participants who(More)
Visual scene displays (VSDs) are a form of augmentative and alternative communication display in which language concepts are embedded into an image of a naturalistic event. VSDs are based on the theory that language learning occurs through interactions with other people, and recommendations for VSD design have emphasized using images of these events that(More)