CAS and Autism: Clinical Recommendations for Assessment and Treatment

Full Article Summary & Clinical Implications

Assessment Guidelines

Evidence Based Treatment Guidelines

Full Article Summary & Clinical Implications

This article reviews the current research evidence related to assessing and treating Childhood Apraxia of Speech (CAS) in children with Autism Spectrum Disorder (ASD)—especially those with low verbal ability.

It also provides practical, evidence-based guidance for speech-language pathologists working with children who have ASD, low verbal ability, and suspected or confirmed CAS. The guidance focuses on how to differentially diagnose SSDs and, if a diagnosis of CAS is confirmed, how best to treat it in this population.

Key Points

CAS is commonly suspected in children with Autism
CAS is suspected at a high rate among children with ASD and low verbal ability. Clinically, SLPs suspect CAS in about one in six children with ASD on their caseloads
Evidence gaps exist
Most CAS treatment studies exclude children with ASD, so clinicians must adapt known evidence-based CAS approaches for this population
Dynamic assessment remains best practice to diagnose CAS
Accurate diagnosis is essential to tailor effective interventions that align with the child’s core deficit
Treatment should focus on motor-based speech approaches combined with behavioral and naturalistic methods
There is no "one size fits all" when it comes to this population, so treatment should be individualized to meet the needs of each child
Combine AAC + speech
Multimodal communication is strongly encouraged to support overall communication skills and reduce frustration.
Communication success and social participation should be treatment priorities
Intervention should aim to improve overall communication and social participation targeting speech, language, and broad communication goals in tandem

Assessment Guidelines

How to differentially diagnose SSDs in children with ASD and low verbal ability

(Assessment of language, cognition, behavior, hearing and other relevant domains are not discussed in the guide but should be carried out as part of a comprehensive assessment.)

Build Rapport First
Begin with one or more familiarization sessions to reduce anxiety and observe natural communication.
Prepare the Environment
Identify motivators and sensory preferences. Use visuals, timers or "first-then" boards to increase cooperation.
Conduct a Comprehensive Speech Assessment
Include:
To identify CAS, dynamic assessment and analysis of spontaneous speech are most pertinent. The goal of dynamic assessment is to assess a child’s accuracy in contexts of increasing difficulty as well as changes given clinician cues.
Analyze Connected Speech
Collect multiple short samples (home, school, therapy). Examine phonetic inventory, syllable shapes, prosody, and intelligibility.
Adapt Testing Tasks
Substitute real objects or play themes for pictures. Provide visual supports and simplify prompts.
Plan For Multiple Sessions
Use extended or repeated sessions to capture sufficient data, especially for minimally verbal children.
Measure Functional Impact
Combine caregiver interviews and use tools such as FOCUS and Intelligibility in Context Scale (ICS)to document everyday communication needs.

Evidence Based Treatment Guidelines (for confirmed CAS)

Use a multimodal approach (speech + AAC)
AAC supports communication, reduces frustration, and does not hinder speech.
Include a motor-based approach for CAS
Use evidence-supported options:
Address foundational skills first when needed
Joint attention, imitation ability, engagement, and cooperation strongly influence speech treatment success.
If children exhibit deficits in foundational skills, use an evidence-based intervention in sync with or prior to beginning speech production treatment. Those include:
Choose Functional, High-Value, Real Word Targets
Start with 5–6 meaningful words, stimulable sounds, and simple syllable structures.
Include prosody early using reduplicated syllables like “no-no” and bisyllables like “baby”
Use short, frequent sessions
Short bursts (2–10 minutes) multiple times per day are more effective.
Alternate drill and play to maintain engagement.
Build treatment around the child's strengths
Use music, visuals, videos, electronics, or structured routines depending on the child’s interests.
Plan for generalization and maintenance
Train caregivers, teachers, and behavior therapists.
Practice in multiple settings.
Continuously adapt treatment
Tailor goals to family priorities, functional communication needs, and the child’s progress.
Use flexible measurement (e.g., accept close approximations for very low verbal children).