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Teaching conceptually referenced core vocabulary for initial augmentative and alternative communication.

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Summary

Individuals with severe intellectual disabilities can learn to use conceptual words in augmentative and alternative communication (AAC). A modified Picture Exchange Communication System (PECS) procedure enabled a boy to use conceptual symbols for core vocabulary.

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Area of Science:

  • Special Education
  • Augmentative and Alternative Communication (AAC)
  • Intellectual Disabilities

Background:

  • Individuals with intellectual disabilities often struggle to develop large vocabularies when using AAC.
  • Core vocabulary, emphasizing frequently used words across contexts, is crucial for maximizing AAC functionality.
  • While conceptual words are common in AAC core vocabularies, individuals with severe intellectual disabilities often start with concrete words.

Observation:

  • There is limited evidence that individuals with severe intellectual disabilities can learn to use conceptually referenced words as their initial AAC vocabulary.
  • A single-subject multiple baseline design across four stimuli was employed to assess learning.
  • The study focused on a 9-year-old boy with multiple disabilities, including intellectual disability and deaf-blindness.

Findings:

  • The intervention, a modified Picture Exchange Communication System (PECS) procedure, successfully taught the participant to use conceptually referenced words.
  • The boy learned to appropriately use three tactile symbols representing the concepts of 'more,' 'done,' and 'new' as his initial communication vocabulary.
  • This demonstrates that individuals with severe intellectual disabilities can acquire and utilize conceptual vocabulary in AAC.

Implications:

  • This research suggests that conceptually based AAC interventions can be effective for individuals with severe intellectual disabilities.
  • The findings challenge the assumption that these individuals must begin with concrete vocabulary.
  • Further research into modified PECS procedures and conceptual vocabulary acquisition in AAC is warranted for this population.