As a paediatrician, we are taught that the developmental progress of a three to four-year-old child should include well over 500 words and that a child should be able to describe things and situations in a meaningful way. This milestone is one that all parents strive for as it is an important part of a child’s normal development. However, in children with Autism Spectrum Disorders (ASD) or special needs, communication issues are common and many children are often slow to begin talking or may not learn to talk at all (Osterlin et al, 1994).
Augmentative and Alternative Communication Strategies (AAC) were originally developed to assist people with severe speech impediments as a means to provide non-vocal options of communicating with others (Paul, 2008). Using AAC as an approach to improve communications is based on the concept that all children have a need to communicate even if their speech is not present. Some examples of AAC methods are:
The use of sign language in ASD and children with special needs who fail to acquire spoken language is well documented as a communication modality. However, it is reported that children with problems with fine motor development are less likely to benefit from this form of AAC.
Picture Exchange Communication System (PECS)
PECS uses visual pictures and symbols as a form of communication with a child with limited verbal communications (Charlop-Christy MH, 2002). At its most basic, the child hands you the picture or indicates by pointing to a picture of what they want. It encourages engagement and initiates a communication between the child and parent or caregiver. PECS is later extended over several stages over a period of time. For example, the child would learn to use two PECS symbols: the first symbol for “I want” and the second symbol for the item requested.
There is no evidence to indicate that the use of PECS cards would interfere or inhibit the development of speech in later years. PECS cards can provide an alternative means of communication for a child with special needs or autism who is unable to speak (Tincani, 2004)
Aided High Technology Voice-Output Communication Aids
Non-verbal children with ASD have been shown to benefit from voice output communication devices which supplement or replace speech (Bernard-Opitz et al, 2001). These require an external power source such as batteries or electricity, and permit the storage and retrieval of electronic messages, symbols and pictures, allowing the user to communicate using a speech output. For example, when the symbol or picture is touched on the device, it produces a voice saying the word out loud at the same time. Today, there are also symbol-supported communication apps like Proloquo2Go which can be programmed directly into an android or iPad which produces a voice-output. Light et al (1998) also reported positive language outcomes in children with ASD when voice output communication devices were included with signs, gestures, and natural speech as a components of a comprehensive communication system.
AAC approaches are compatible with the development of speech as well as used as means of improving communications for children with ASD and special needs. However, there is still a paucity of large scale research in this area and many studies have small sample sizes. Early interventions using AAC for children with ASD and special needs has been shown to make a dramatic difference in improving the function and form of communication (Lord, 2001). There is a growing belief in the speech therapist community that AAC approaches have a beneficial impact on speech development and will reduce the frustration and anxiety caused to children by their lack of or delayed speech development.
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Charlop-Christy MH, et al. Using the picture exchange communication system (PECS) with children with autism: assessment of PECS acquisition, speech, social-communicative behavior, and problem behavior. Journal of Applied Behavior Analysis 2002;35(3):213–231
Light JC, et al. Augmentative and alternative communication to support receptive and expressive communication for people with autism. Journal of Communication Disorders 1998;31(2):153–178.
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Seal B, Bonvillian J. Sign language and motor functioning in students with autistic disorder. Journal of Autism and Developmental Disorders 1997;(27):437–466
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