The effectiveness of aided augmented input techniques for persons with developmental disabilities: a systematic...

Area of Science:

• Speech-Language Pathology
• Augmentative and Alternative Communication (AAC)
• Developmental Disabilities Research

Background:

• Clinicians often recommend augmented input for individuals with limited functional speech.
• Augmented input involves communication partners using the client's AAC device during interaction.
• This strategy is hypothesized to enhance language acquisition in terms of form and content.

Purpose of the Study:

• To systematically review the effects of augmented input on communication outcomes.
• Focus on individuals with developmental disabilities and childhood apraxia of speech using aided AAC.
• Evaluate the evidence base for augmented input in this population.

Main Methods:

• Conducted a systematic review of 19 studies meeting inclusion criteria.
• Analyzed participant characteristics, terminology, symbol format, and augmented input strategies.
• Assessed measured outcomes, effectiveness, and study quality.

Main Results:

• Augmented input demonstrated improvements in single-word vocabulary skills.
• Evidence suggests enhanced expression of multi-symbol utterances.
• Comprehension beyond the single-word level and effects on specific diagnostic groups remain underexplored.

Conclusions:

• Augmented input shows promise for improving specific communication skills in AAC users.
• Limitations in current research hinder definitive conclusions for distinct diagnostic populations.
• Future research should investigate comprehension and refine understanding across different user groups.