Patterns of AAC use and communicative functions in minimally verbal autistic children following introduction of AAC tools and caregiver training: A corpus-based analysis.
Teaching caregivers to model low-tech AAC at home quickly moves minimally verbal autistic children from only requesting to spontaneous joint attention and comments, yet emotional and regulatory messages still need targeted support.
01Research in Context
What this study did
Yuhan and colleagues followed a small group of minimally verbal autistic children at home. Each family got low-tech AAC boards plus five caregiver coaching sessions.
The team recorded every AAC use for months. They sorted each message into six jobs: request, joint attention, comment, answer, regulate, or show emotion.
What they found
Every child began to use AAC on their own. Requests stayed strong, but new types appeared: kids pointed out toys to share interest and labeled things they saw.
Two jobs lagged. Few messages asked for help or expressed feelings like ‘I’m mad.’ Spontaneity grew, yet emotional self-control words stayed rare.
How this fits with other research
The result extends Ganz et al. (2004) and Kleinert et al. (2007). Those studies taught only requests through PECS or voice-output aids. Yuhan shows caregiver training can push functions beyond requesting without extra drills.
Moya et al. (2022) is a conceptual replication. Their Indian preschoolers also gained spontaneous requests, but used an app at school. Yuhan matches the gain with paper boards at home, showing the medium matters less than caregiver mediation.
Naoi et al. (2008) taught joint attention directly. Yuhan got the same outcome as a side effect of AAC coaching, suggesting a cheaper route to shared attention.
Why it matters
You can broaden a child’s AAC use simply by coaching parents. After a handful of sessions, kids start commenting and showing, not just asking. Keep an eye on emotional and regulatory messages; those functions need extra modeling and specific vocabulary. Add ‘help,’ ‘break,’ or ‘I’m upset’ icons early, and prompt their use during tough moments.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Add ‘help,’ ‘break,’ and feeling icons to each child’s board this week, and model them during routines that typically evoke frustration.
02At a glance
03Original abstract
BACKGROUND: Research on Augmentative and Alternative Communication (AAC) for autistic children often focuses primarily on request-based skills. However, growing evidence highlights the importance of broader functional applications. METHODS: This study employed a corpus-based design to describe patterns of change following the introduction of caregiver-mediated, low-tech aided AAC tools and training aimed at increasing spontaneous communication and functional diversity in preschool and school-aged autistic children. The AAC training was integrated into home routines, where caregivers systematically prompted and reinforced AAC use. Caregiver-child interactions were recorded during three phases: the first, second, and final time points. RESULTS: Results showed that all participants moved from limitations at the first time point (AAC use was minimal or prompt-dependent) to varying levels of spontaneous AAC engagement. Their communication diversified beyond instrumental functions (basic requesting) to include interactional functions (joint attention initiation) and informative functions (environmental commentary). CONCLUSIONS: While increases were observed in communicative autonomy in natural settings, persistent gaps in regulatory and emotional functions suggested limitations in current AAC approaches, indicating a need for personalized strategies targeting higher-level communication skills.
Research in developmental disabilities, 2026 · doi:10.1016/j.ridd.2025.105188