Symbols, Symbols What to use????. Clinical Scenario . Why do Speech Pathologists make use of graphic symbols? Graphic symbols may take many forms. baby. High degree of resemblance Abstract. How our question developed? . A member’s personal experience
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What to use????
of resemblance Abstract
A member’s personal experience
She asked Why? What is the evidence for this?
In people who use AAC are coloured photographs easier to comprehend than line drawings?
Sevcik & Romski (1986)
Mirenda and Locke (1989) Study on symbol transparency
Kozleski (1991b) compared acquisition rates of a variety of abstract to more iconic symbols, including coloured photographs and line drawings, for requesting function across four individuals with autism: fewer sessions were needed for highly iconic symbols.
There is insufficient high level evidence to conclusively inform choice of one graphic symbol set over another.
Some minimal level of language skill may make the use of certain symbol types easier to learn
Consider CAT limitations
In absence of strong evidence
Monitor the integrity of our intervention
Sevcik, RA and Romski, MA (1986). Representation matchings skills o persons with severe retardation. Augmentative and Alternative Communication. 2(4), 160-164
Mirenda and Locke (1989). A comparison of symbol transparency in non-speaking person with intellectual disabilities. Journal of Speech and Hearing Disorders. 54, 131-149.
Schlosser, RW and Sigafoos, J (2002). Selecting graphic symbols for an initial request lexicon: Integrative review. Augmentative and Alternative communication. 18, 102-123
Stephenson (2009). Iconicity in the Development of Picture Skills: Typical Development and Implications for Individuals with Severe Intellectual Disabilities Augmentative and Alternative Communication. 25 (3), 187-201