# Validated Outcome Measures for Childhood Apraxia of Speech in Early Childhood

Canonical: https://pinnacleblooms.org/ask/which-validated-outcome-measures-are-used-to-study-childhood-apraxia-of-speech-in-early-childhood
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

Early-childhood CAS research uses a combination of validated motor-speech measures — DEMSS, VMPAC, MSAP — alongside PCC/PPC and vowel accuracy, lexical-stress and prosody indices, acoustic-kinematic variability metrics, and intelligibility/participation outcomes, rather than a single gold-standard tool. ASHA and EACD remain the anchoring consensus references for measure selection.

*For researchers studying Childhood Apraxia of Speech, the validity of your findings rests on the measures you choose — and CAS demands instruments sensitive to motor-speech planning, not just articulation.*

## In short
Studying Childhood Apraxia of Speech (CAS; ICD-11 6A01.0) in early childhood relies on a combination of validated motor-speech assessments, perceptual severity ratings, and functional outcome measures rather than a single gold-standard tool. The most widely cited instruments include the **Dynamic Evaluation of Motor Speech Skill (DEMSS)**, the **Verbal Motor Production Assessment for Children (VMPAC)**, and the **Madison Speech Assessment Protocol (MSAP)** for research-grade phenotyping, supplemented by percent phonemes/consonants correct, **Percent Phonemes Correct (PPC)**, vowel accuracy, and prosody-lexical-stress measures. Functional and participation-level change is increasingly captured with intelligibility and communicative-participation tools alongside acoustic and kinematic indices.

## The measurement landscape
**Motor-speech diagnostic and severity measures**
- **DEMSS** — a dynamic, cue-graded assessment well suited to young and minimally verbal children, with established inter-rater reliability for differentiating CAS.
- **VMPAC** — examines global motor control, sequencing and connected speech; useful for characterising the motor-planning substrate.
- **MSAP** — a research protocol bundling multiple subtests to phenotype CAS consistently across study sites.

**Segmental and prosodic accuracy indices**
- Percent Consonants Correct (PCC), Percent Phonemes Correct (PPC) and percent vowels correct, derived from standardised single-word and connected-speech sampling.
- Lexical-stress and prosody measures (e.g. stress-ratio and pairwise variability indices) — central, because inappropriate prosody is a consensus diagnostic marker of CAS.
- Acoustic and kinematic indices (token-to-token variability, vowel-space metrics) for objective, repeatable change detection.

**Functional and participation outcomes**
- Single-word and connected-speech **intelligibility** measures (e.g. percentage intelligible to unfamiliar listeners).
- Communicative-participation and caregiver-report tools to capture real-world impact beyond the clinic.

For early childhood specifically, dynamic and elicited-imitation tasks are preferred over static naming tests, and repeated-measures designs benefit from instruments with documented responsiveness and minimal floor effects. The ASHA technical report and EACD recommendations remain the anchoring consensus references for measure selection. See our [Childhood Apraxia of Speech overview](/childhood-apraxia-of-speech) for the clinical phenotype underpinning these choices.

## The Pinnacle way
AbilityScore® is part of Pinnacle’s developmental assessment. Diagnosis, where needed, requires an appropriately qualified healthcare professional — never from an online form, app or self-administered checklist; our [structured clinician-administered assessment](/ask/what-is-the-abilityscore-and-how-is-it-calculated) is designed to complement, not replace, validated research measures. Across **2.5 billion+ data points** and **25 million+ therapy sessions**, our [speech therapy](/speech-therapy) programmes apply repeatable motor-speech outcome tracking suited to longitudinal study. Research partners can engage through our [research collaboration pathway](/research).

## Trusted sources
American Speech-Language-Hearing Association technical report on Childhood Apraxia of Speech (asha.org); European Academy of Childhood Disability recommendations on assessment (eacd.org); WHO ICD-11 classification entry for 6A01.0 (icd.who.int).

**Next step —** If you are designing a CAS outcome study, [partner with our research team](/research) to align measures with a clinician-governed assessment framework.

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.

## Sources
- ASHA technical report on Childhood Apraxia of Speech: https://www.asha.org/practice-portal/clinical-topics/childhood-apraxia-of-speech/
- European Academy of Childhood Disability assessment recommendations: https://eacd.org/
- WHO ICD-11 entry 6A01.0: https://icd.who.int/browse11

## Connected topics and perspectives
- Conditions: https://pinnacleblooms.org/ask/conditions
- Researcher: https://pinnacleblooms.org/ask/lens/stakeholder/researcher
- Communication: https://pinnacleblooms.org/ask/lens/domain/communication
- Assessment: https://pinnacleblooms.org/ask/lens/intent/assessment
- Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen
- Occupational Therapy: https://pinnacleblooms.org/ask/lens/route/occupational-therapy
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

### Understand the subject
- Early Intervention Outcomes in Childhood Apraxia of Speech (Under 7): https://pinnacleblooms.org/ask/what-does-current-research-show-about-early-intervention-outcomes-for-childhood-apraxia-of-speech-in-children-under-7
- What is Childhood Apraxia of Speech and its ICD-11 features?: https://pinnacleblooms.org/ask/what-is-childhood-apraxia-of-speech-and-what-are-its-icd-11-features-in-early-childhood
- How does Childhood Apraxia of Speech affect a child's daily life?: https://pinnacleblooms.org/ask/how-does-childhood-apraxia-of-speech-affect-a-child-s-daily-life
- Is Childhood Apraxia of Speech considered a disability?: https://pinnacleblooms.org/ask/is-childhood-apraxia-of-speech-considered-a-disability
- Is Childhood Apraxia of Speech Genetic or Hereditary?: https://pinnacleblooms.org/ask/is-childhood-apraxia-of-speech-genetic-or-hereditary
- What are common myths about Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/what-are-common-myths-about-childhood-apraxia-of-speech
- What are the types or levels of Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/what-are-the-types-or-levels-of-childhood-apraxia-of-speech
- What causes Childhood Apraxia of Speech in children?: https://pinnacleblooms.org/ask/what-causes-childhood-apraxia-of-speech-in-children
- What is Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/what-is-childhood-apraxia-of-speech
- Childhood Apraxia of Speech in Early Childhood: https://pinnacleblooms.org/ask/what-is-childhood-apraxia-of-speech-and-what-does-it-look-like-in-early-childhood
- ICD-11 Classification of Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-childhood-apraxia-of-speech
- SNOMED CT Concept for Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-is-the-snomed-ct-concept-for-childhood-apraxia-of-speech

### Recognise signs & concerns
- Can Childhood Apraxia of Speech be cured?: https://pinnacleblooms.org/ask/can-childhood-apraxia-of-speech-be-cured
- Can Childhood Apraxia of Speech be prevented?: https://pinnacleblooms.org/ask/can-childhood-apraxia-of-speech-be-prevented
- Do boys show Childhood Apraxia of Speech differently?: https://pinnacleblooms.org/ask/do-boys-show-childhood-apraxia-of-speech-differently
- Do girls show Childhood Apraxia of Speech differently?: https://pinnacleblooms.org/ask/do-girls-show-childhood-apraxia-of-speech-differently
- Spotting Childhood Apraxia of Speech early at the frontline: https://pinnacleblooms.org/ask/how-can-a-frontline-health-worker-spot-a-child-with-possible-childhood-apraxia-of-speech-early
- Should I be worried about Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/should-i-be-worried-my-child-might-have-childhood-apraxia-of-speech
- Early Signs of Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-childhood-apraxia-of-speech
- Early signs of Childhood Apraxia of Speech in a 1-year-old boy: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-childhood-apraxia-of-speech-in-a-1-year-old-boy
- Early Signs of Childhood Apraxia of Speech in a 1-Year-Old Girl: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-childhood-apraxia-of-speech-in-a-1-year-old-girl
- Early Signs of Childhood Apraxia of Speech at 12–18 Months: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-childhood-apraxia-of-speech-in-a-12-to-18-month-old
- Early Signs of Childhood Apraxia of Speech at 18–24 Months: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-childhood-apraxia-of-speech-in-a-18-to-24-month-old
- Early Signs of Childhood Apraxia of Speech at 2 Years: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-childhood-apraxia-of-speech-in-a-2-year-old

### Explore causes & influences
- Are Boys More Likely to Have Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/are-boys-more-likely-to-have-childhood-apraxia-of-speech
- Are girls more likely to have Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/are-girls-more-likely-to-have-childhood-apraxia-of-speech
- Early intervention for Childhood Apraxia of Speech: advancing UNCRPD and the SDGs: https://pinnacleblooms.org/ask/how-does-early-intervention-for-childhood-apraxia-of-speech-advance-un-child-rights-uncrpd-and-the-sdgs
- Contributing factors for Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-are-the-known-contributing-factors-for-childhood-apraxia-of-speech-in-early-childhood
- What Causes Childhood Apraxia of Speech in Young Children?: https://pinnacleblooms.org/ask/what-causes-childhood-apraxia-of-speech-in-young-children
- Cost-effectiveness of early therapy for Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-is-the-cost-effectiveness-of-early-therapy-for-childhood-apraxia-of-speech-in-young-children
- Prevalence and Public-Health Burden of Childhood Apraxia of Speech in India: https://pinnacleblooms.org/ask/what-is-the-prevalence-and-public-health-burden-of-childhood-apraxia-of-speech-among-young-children-in-india

### Understand assessment
- CAS assessment: standardised tools: https://pinnacleblooms.org/ask/which-standardised-tools-are-used-to-assess-childhood-apraxia-of-speech-in-early-childhood
- How Childhood Apraxia of Speech Is Assessed in a Young Child: https://pinnacleblooms.org/ask/how-is-childhood-apraxia-of-speech-assessed-in-a-young-child
- CAS: Screening and Diagnostic Pathway Under 7: https://pinnacleblooms.org/ask/what-is-the-recommended-screening-and-diagnostic-pathway-for-childhood-apraxia-of-speech-in-children-under-7
- How AbilityScore Tracks Progress in Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/how-does-abilityscore-track-progress-in-a-child-with-childhood-apraxia-of-speech
- How Is Childhood Apraxia of Speech Assessed in Children Under 7?: https://pinnacleblooms.org/ask/how-is-childhood-apraxia-of-speech-assessed-in-children-under-7
- What an AbilityScore of 0–100 Means in Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-0-100-mean-for-a-child-with-childhood-apraxia-of-speech
- What an AbilityScore of 100–200 means for Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-100-200-mean-for-a-child-with-childhood-apraxia-of-speech
- AbilityScore 200–300 in Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-200-300-mean-for-a-child-with-childhood-apraxia-of-speech
- What does an AbilityScore of 300–400 mean for a child with Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-300-400-mean-for-a-child-with-childhood-apraxia-of-speech
- What an AbilityScore of 400–500 means for a child with Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-400-500-mean-for-a-child-with-childhood-apraxia-of-speech
- What an AbilityScore of 500–600 means in Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-500-600-mean-for-a-child-with-childhood-apraxia-of-speech
- What does an AbilityScore of 600–700 mean for a child with Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-600-700-mean-for-a-child-with-childhood-apraxia-of-speech

### Explore therapy & support
- What therapy goals matter most for a child with Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/what-therapy-goals-matter-most-for-a-child-with-childhood-apraxia-of-speech
- Supporting a child with Childhood Apraxia of Speech day to day: https://pinnacleblooms.org/ask/as-a-grandparent-or-caregiver-how-can-i-support-a-child-with-childhood-apraxia-of-speech-day-to-day
- Can a child with CAS attend mainstream school?: https://pinnacleblooms.org/ask/can-a-child-with-childhood-apraxia-of-speech-attend-a-mainstream-school
- Can a Child With Childhood Apraxia of Speech Attend Regular School?: https://pinnacleblooms.org/ask/can-a-child-with-childhood-apraxia-of-speech-attend-a-regular-school
- Can a Child With Childhood Apraxia of Speech Live Independently?: https://pinnacleblooms.org/ask/can-a-child-with-childhood-apraxia-of-speech-grow-up-to-live-independently
- How a Teacher Can Support a Child with Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/how-can-a-classroom-teacher-help-a-child-with-childhood-apraxia-of-speech-take-part-and-learn
- Childhood Apraxia of Speech in District Early Intervention: https://pinnacleblooms.org/ask/how-can-a-district-early-intervention-programme-identify-and-support-children-under-7-with-childhood-apraxia-of-speech
- How a Teacher Can Support a Child with Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/how-can-a-teacher-include-and-support-a-young-child-with-childhood-apraxia-of-speech-in-a-mainstream-classroom
- How can we support communication development in a child with Childhood Apraxia of Speech?: https://pinnacleblooms.org/ask/how-can-we-support-communication-development-in-a-child-with-childhood-apraxia-of-speech
- Therapy for Childhood Apraxia of Speech: https://pinnacleblooms.org/ask/how-does-therapy-help-a-child-with-childhood-apraxia-of-speech-make-progress
- How Is Childhood Apraxia of Speech Diagnosed in a Child?: https://pinnacleblooms.org/ask/how-is-childhood-apraxia-of-speech-diagnosed-in-a-child
- How Childhood Apraxia of Speech Is Supported Through Therapy: https://pinnacleblooms.org/ask/how-is-childhood-apraxia-of-speech-supported-through-therapy

### At home & in everyday life
- How to Support Your Child with Childhood Apraxia of Speech at Home: https://pinnacleblooms.org/ask/how-can-i-support-my-child-with-childhood-apraxia-of-speech-at-home