10-Minute Speech Practice That Doesn't Require Sitting Still

Last updated 2026-07-09

Who is Edythe Strand and why does she matter for apraxia?

Edythe Strand spent more than three decades at Mayo Clinic's Department of Neurology, where she focused almost entirely on motor speech disorders in children and adults. She retired as a Professor Emerita of Speech-Language Pathology from Mayo Clinic College of Medicine, and her name comes up in nearly every serious clinical conversation about childhood apraxia of speech.

Her influence isn't just academic. The diagnostic features most speech-language pathologists (SLPs) use today to identify CAS during an office visit trace back significantly to her work. So do the therapy approaches that put motor learning ahead of traditional articulation drilling. If your child has been evaluated for CAS or is being treated for it, the framework your therapist is working from was almost certainly shaped by Strand.

She's also one of the people behind CASANA (Apraxia Kids), the main nonprofit advocacy organization for families dealing with CAS. That connection moved her research relatively quickly out of journals and into clinics and parents' hands.

Nobody in this field has clean data on how many children have CAS. The estimate most often cited is somewhere between 1 and 2 per 1,000 children, but Strand herself has noted in published work that the true prevalence is unknown because the disorder is so hard to identify reliably ^[1]. That difficulty is exactly what her diagnostic work set out to fix.

What is childhood apraxia of speech, in plain terms?

CAS is a motor speech disorder. The child's brain has trouble planning and programming the movements that produce speech. The muscles themselves are fine. The child knows what they want to say. The breakdown sits in the motor signal between the intention and the execution.

This is different from a phonological disorder (where a child has wrong sound rules in their head), different from dysarthria (where the muscles are actually weak or uncoordinated), and different from a language delay (where the child simply hasn't picked up enough vocabulary or grammar yet). Those distinctions matter enormously for treatment. An approach built for a phonological disorder can make a child with CAS worse, or at minimum burn months of irreplaceable early intervention time.

The American Speech-Language-Hearing Association describes CAS as characterized by "inconsistent errors on consonants and vowels in repeated productions of syllables or words, lengthened and disrupted coarticulatory transitions between sounds and syllables, and inappropriate prosody, especially in the realization of lexical or phrasal stress" ^[2]. Dense clinical language. The plain version: the child says the same word differently each time, their speech sounds choppy or oddly timed, and their errors are hard to predict.

You can read a broader overview of what apraxia of speech looks like across the lifespan. In children the picture often includes limited babbling as an infant, very few consonants in early speech attempts, and real difficulty imitating mouth movements on request. Some children with CAS are nearly nonverbal for years, which is why AAC devices often enter the picture early.

What diagnostic criteria did Edythe Strand develop?

The three core diagnostic features ASHA lists (inconsistent errors, disrupted coarticulation, and inappropriate prosody) come substantially from Strand's research and from collaborative work she did with colleagues including Ruth Stoeckel and others affiliated with Apraxia Kids.

Before her work, clinicians had no agreed-upon checklist. Different hospitals, textbooks, and regions used different definitions, which meant a child could be diagnosed with CAS in one city and told they had a phonological disorder in another. Strand pushed for operational definitions a working SLP could actually apply during an evaluation.

Her Dynamic Motor Speech Assessment (DMSA) is one practical tool that came out of that effort. It's a standardized protocol for pulling speech samples in ways that expose motor planning problems specifically. It looks at whether the child can improve accuracy on a word across multiple attempts (motor practice effect), how errors shift with word length and complexity, and how prosody holds up under demand.

The DMSA isn't the only assessment tool for CAS, and Strand herself has been clear in published work that no single test definitively diagnoses the condition ^[3]. The diagnosis still needs an experienced clinician making a judgment call across multiple data points. But the DMSA gives that clinician a structured way to collect those points, which cuts the guesswork considerably.

One honest limitation: some rural or under-resourced areas still have SLPs who haven't been trained in current CAS diagnostic protocols. If you suspect your child has CAS and the evaluating therapist seems shaky on the diagnostic criteria, get a second opinion from a specialist in motor speech disorders. Major children's hospitals and university speech clinics usually have someone with that training.

What treatment principles come from Strand's research?

Strand's biggest treatment contribution is probably her articulation of how motor learning principles apply to CAS therapy. It sounds technical. The practical implications for any parent watching their child in therapy are not.

Motor learning research (from fields including sports science and rehabilitation) tells us that skills requiring precise motor coordination respond to specific kinds of practice. High repetition matters. The type of feedback matters. So does how practice is spread across time. For CAS specifically, Strand's work helped establish a few things.

Children need many more practice trials per session than traditional speech therapy usually provides. A child with a phonological disorder might work through a handful of target words in a session. A child with CAS may need 50 to 100 or more practice attempts at a specific motor target in that same window.

Feedback should be frequent early in learning, then tapered as the child's motor program stabilizes. This is called fading feedback, and it's counterintuitive because parents want to praise every attempt. Constantly confirming "yes, that's right" can actually keep the child from building internal self-monitoring.

The sequence of targets matters too. Strand's approach, formalized in a treatment called Dynamic Temporal and Tactile Cueing (DTTC), starts with maximum support (the therapist models at the same time the child speaks) and systematically pulls that support back as accuracy grows. That graduated release is the engine of the treatment.

DTTC is one of the approaches ASHA lists as having the most research support specifically for CAS ^[2]. It's Strand's most direct clinical legacy, and it's what you want to see when you're checking whether a therapist is using evidence-based practice for a CAS diagnosis.

For children who are minimally verbal, CAS treatment often runs alongside early intervention services and may be paired with augmentative communication support. That parallel track doesn't slow speech down. Most evidence suggests it helps.

How does DTTC (Dynamic Temporal and Tactile Cueing) actually work?

DTTC is the treatment Strand developed and refined over her career. The name describes its two main tools: timing cues (therapist and child speak at the same time, or the therapist speaks just before the child) and tactile cues (light touches on the jaw, lips, or face to guide movement when needed).

A DTTC session looks nothing like traditional articulation therapy. There's no picture card drill where the child names images one after another. Instead the therapist picks a small set of target words that mean something to the child (maybe five words the child actually wants to use) and practices those words intensively, cycling through levels of support.

Level 1: Therapist and child say the word at exactly the same time. The child is essentially borrowing the therapist's motor execution.

Level 2: The therapist says the word just before the child, giving an auditory model that's almost simultaneous.

Level 3: The therapist says the word, then waits, then the child tries independently.

Level 4: The child attempts the word with no model.

The therapist moves between these levels inside a single session, reading the child's accuracy in real time. If the child starts struggling at level 3, you drop back to level 2. The goal is to keep accuracy high (roughly 80 percent or above) because practicing errors in a motor disorder reinforces the wrong motor program.

Strand has published on DTTC extensively, including in the American Journal of Speech-Language Pathology ^[4]. The research base for it is stronger than for most other CAS-specific approaches, with honest caveats: most studies have small samples because CAS itself is rare, and large randomized controlled trials are hard to run in this population.

What does Strand say about the difference between CAS and other speech disorders?

Strand has written and presented extensively on what she calls the differential diagnosis problem. CAS gets misdiagnosed a lot, usually in one of two directions: a child with CAS is told they have a phonological disorder, or a child with a severe phonological disorder is told they have CAS.

The distinction matters because the treatments diverge. Phonological therapy targets the underlying sound system rules. Motor speech therapy targets movement planning. Pick the wrong one and you waste time at best.

Her guidance, reflected in ASHA's technical report on CAS, is to look at a specific cluster of features rather than any single symptom. Inconsistent errors are the most telling: ask a child to say "butterfly" three times, and if they produce three different error patterns, that inconsistency is a red flag for CAS. A child with a phonological disorder tends to make the same systematic error every time.

Vowel errors are another marker. Children with typical phonological disorders rarely make them. Children with CAS often do, and those errors frequently distort the quality and duration of vowels in ways that make speech sound "off" even when the consonants are close to correct.

Prosody, the rhythm and stress of speech, is the third major marker. A child with CAS often sounds robotic or choppy, or lands stress on the wrong syllable, even as individual sounds improve.

None of these features is pathognomonic, meaning none of them alone closes the case. That's what makes CAS hard to diagnose and why Strand has been vocal about SLPs needing specialized training before they call it. An SLP who specializes in motor speech disorders or who has completed CASANA-affiliated training is better placed to make this call than a generalist.

This is especially relevant for children on the autism spectrum, where communication differences can overlap with motor speech difficulties in complicated ways. The autism spectrum speech therapy picture often means ruling out CAS specifically before settling on a treatment approach.

How many sessions does CAS treatment require and how long does progress take?

This is one of the questions parents ask most, and the honest answer is: it depends on severity, age at diagnosis, therapy frequency, and how consistently practice happens at home.

Strand and others in the field have argued consistently that children with CAS need more therapy than children with phonological disorders, and that frequency matters more than total duration. Two to three sessions per week is a commonly recommended minimum for moderate to severe CAS, though some children need heavier scheduling, especially early in treatment ^[3].

For children with mild CAS, progress can show up within weeks of starting DTTC. For children who are minimally verbal or who have severe CAS, meaningful functional speech gains may take years. That timeline is hard to hear, and it's worth saying plainly rather than softening it.

Home practice is not optional. Motor learning demands high repetition, so the 45 minutes a week a child spends with an SLP isn't close to enough on its own. Strand's recommendations, echoed in Apraxia Kids resources, put structured daily practice at home on the parent. The SLP designs the practice and adjusts targets. The parent does the reps.

*These ranges are rough clinical estimates, not research-derived norms. Individual variation is enormous.

If progress stalls after several months of consistent treatment, ask the SLP to re-check whether the diagnosis is right, whether the approach needs to change, or whether a more intensive schedule is possible. Strand herself has written that CAS treatment should be dynamic and responsive, not a fixed protocol applied without adjustment.

What should parents look for in a therapist who knows Strand's approach?

Finding an SLP who is current on CAS research is harder than it should be. CAS is covered in most speech pathology graduate programs, but the depth of training varies wildly. A therapist who graduated 15 years ago may have learned approaches that have since been largely replaced.

The most reliable signal is specific training in one of the evidence-based CAS treatments: DTTC, the Nuffield Dyspraxia Programme, or the Rapid Syllable Transition Treatment (ReST). Apraxia Kids keeps a directory of SLPs who have completed their training workshops, which is a reasonable starting point. The directory doesn't guarantee quality, but it filters for therapists who at least went looking for current training.

Questions worth asking before you start:

"What approach do you use for CAS specifically?" A therapist who says "I treat it like articulation" is a yellow flag. DTTC or a similar motor-learning-based approach should come up.

"How many practice trials does my child typically get in a session?" Dozens is reasonable. Single digits means the therapy probably isn't motor-learning-informed.

"How do you involve parents in home practice?" No clear answer here is a problem.

Speech therapy quality varies more than most parents realize, and advocating for your child in the therapy room is both appropriate and necessary. Strand's published work is public, and ASHA's technical report on CAS is free to read. You can be an informed consumer.

For families without a local CAS specialist, online speech therapy has grown a lot, and some strong CAS specialists work fully remotely. The tactile cueing part of DTTC is harder to deliver over video, but experienced therapists have adapted.

Is Strand's work relevant for children who have CAS alongside autism or other diagnoses?

Yes, and this is an area where Strand has spoken directly. CAS doesn't only show up as an isolated diagnosis. It frequently appears alongside autism spectrum disorder, Down syndrome, galactosemia, fragile X syndrome, and other genetic or neurodevelopmental conditions.

When CAS co-occurs with autism, the communication picture gets complicated fast. Echolalia, motor speech difficulties, and language processing differences can all show up at once, and they call for different interventions. A therapist who addresses one and ignores the others will get partial results at best.

Strand has emphasized that the presence of another diagnosis doesn't change the core logic of CAS treatment. The motor planning problem is still the motor planning problem, whatever else is going on. Treatment still targets motor learning, still needs high repetition, and still needs to be systematic. What changes is delivery: children with significant sensory sensitivities may not tolerate tactile cues, children with limited attention may need shorter, more frequent practice bursts, and children who rely on AAC devices need a therapist who can weave device-based communication into speech production work instead of treating them as rivals.

A good reference point is ASHA's practice portal on CAS, which addresses co-occurring conditions directly and notes that "the presence of co-occurring conditions does not preclude CAS from being diagnosed or treated" ^[2]. That's not a throwaway line. Some parents have been told, wrongly, that their child's autism makes CAS diagnosis impossible or makes speech therapy pointless. Neither is true.

Little Words, an AI speech companion built for neurodivergent kids, can be one home practice tool between therapy sessions, especially for children who respond well to screen-based interaction. It's not a substitute for an SLP, but it can help fill the repetition gap every CAS family runs into.

What has Strand published, and where can parents actually read it?

Strand has published dozens of peer-reviewed articles over her career. The ones most useful to parents trying to understand CAS are reachable in a few ways.

ASHA's journals, including the American Journal of Speech-Language Pathology and Language, Speech, and Hearing Services in Schools, have published her work. Some articles sit behind paywalls, but ASHA members can access them, and many university libraries offer public access.

ASHA's Practice Portal on Childhood Apraxia of Speech is the most accessible summary of the current evidence base, and it reflects the research tradition Strand helped build. It's free and regularly updated ^[2].

Apraxia Kids (apraxia-kids.org) has published guides, webinar recordings, and parent summaries that draw heavily on Strand's and similar researchers' work. Strand has presented at their annual conference multiple times, and recordings of some of those talks are on their website.

One specific paper worth knowing: Strand et al. (2006) published "Measuring Treatment Response in Children with Childhood Apraxia of Speech" in Topics in Language Disorders, which laid out an early systematic framework for tracking therapy outcomes. It's cited often in later research and gives parents a sense of what measurable progress in CAS should look like.

For a book-length treatment, "Treating Childhood Apraxia of Speech" by Strand and Skinder (1999), published in Caruso and Strand's edited volume "Clinical Management of Motor Speech Disorders in Children," is still a reference point for clinicians even though it predates some later developments in DTTC.

The takeaway for parents: you don't need to read journal articles to help your child. But knowing this evidence base exists, and that the therapy your child gets should connect to it, makes you a sharper advocate.

What are the biggest misconceptions about CAS that Strand's work has helped correct?

A few stubborn myths have done real harm to children with CAS. Strand's research has pushed back on all of them.

Myth: CAS is just a severe articulation delay. Wrong. The mechanism is different, the treatment is different, and treating CAS like an articulation delay produces poor outcomes.

Myth: Children will outgrow CAS if you wait. Some children with mild CAS do make rapid progress with intervention, but CAS does not self-correct the way some late talking does. Waiting costs a child the most neuroplastic period of their development. Earlier intervention produces better outcomes, full stop.

Myth: CAS can be diagnosed from a checklist alone. No valid checklist or app diagnoses CAS. The diagnosis requires a qualified SLP running a full evaluation, watching the child across multiple tasks and contexts.

Myth: Once speech improves, therapy is done. Many children with CAS need ongoing support as language demands climb (longer words, more complex sentences, reading and spelling, which lean on some of the same motor-phonological processes). Discharge should be based on function, not on whether the child sounds okay at a quiet kitchen table.

Myth: AAC use will keep speech from developing. This one is especially harmful and is contradicted directly by current evidence. Strand and ASHA line up here: giving AAC to a child with limited verbal output does not suppress speech. For many children it speeds it up by cutting the communicative frustration that can shut down practice attempts entirely.

If you hear any of these myths from a professional, that tells you something useful about whether they're current on the evidence.

What questions should parents bring to their child's next evaluation or therapy session?

Armed with even a basic grasp of Strand's work, parents can have far more productive conversations with their child's clinical team. Here are concrete questions that tend to open useful ones.

"Has my child's evaluation specifically looked for the three diagnostic markers of CAS: inconsistent errors, disrupted coarticulation, and inappropriate prosody?" If the evaluating SLP doesn't recognize these terms, that's informative.

"What treatment approach are you planning, and is it built for motor speech disorders specifically?" DTTC, ReST, and the Nuffield Dyspraxia Programme are all acceptable answers. Generic articulation therapy, Lidcombe, or language-focused approaches used alone are not.

"How will we measure progress?" There should be a specific, observable answer, better than "we'll see how he's doing."

"What should I be doing at home between sessions, and how many practice trials are we aiming for?" No structured home practice plan? Ask for one.

"Is my child's therapy frequency enough given the severity of the diagnosis?" One session per week for a child with moderate or severe CAS is usually not.

Going in with these questions isn't being adversarial. Most SLPs welcome informed, engaged parents. It means showing up as a real partner in your child's care, which is exactly what Strand's emphasis on parent involvement in home practice asks for anyway.

For families managing all of this, connecting with other CAS parents through Apraxia Kids' online community can add practical guidance no article fully replaces. The experience of parents who've already been through the diagnostic and treatment process is genuinely valuable, as long as it sits alongside guidance from a qualified clinician.

Frequently asked questions

What is Edythe Strand best known for in speech pathology?

Strand is best known for her work on childhood apraxia of speech, particularly the development of Dynamic Temporal and Tactile Cueing (DTTC) as a treatment approach and her contributions to the diagnostic criteria for CAS. She spent her career at Mayo Clinic and helped translate motor learning science into practical clinical protocols. Her work forms the backbone of ASHA's current CAS practice guidelines.

How is childhood apraxia of speech diagnosed?

CAS is diagnosed by a speech-language pathologist through a full evaluation looking for three core features: inconsistent speech errors across repeated attempts, disrupted transitions between sounds and syllables, and inappropriate prosody (rhythm and stress). No single test or checklist is sufficient. The diagnosis requires an experienced clinician observing the child across multiple speaking tasks.

What is DTTC and is it proven to work?

DTTC stands for Dynamic Temporal and Tactile Cueing. It's a treatment developed by Edythe Strand that uses simultaneous modeling and touch cues, then gradually removes that support as the child's accuracy improves. ASHA lists it as having the strongest research support among CAS-specific treatments. Most supporting studies have small samples because CAS is rare, but the consistency of positive findings is notable.

Can a child have both CAS and autism?

Yes. CAS co-occurs with autism spectrum disorder in a meaningful subset of children. The presence of autism doesn't prevent a CAS diagnosis or make CAS treatment less appropriate. ASHA's practice portal explicitly states that co-occurring conditions don't preclude CAS diagnosis. Treatment may need to be adapted for sensory sensitivities or attention differences, but the motor learning principles still apply.

How often should a child with CAS receive speech therapy?

For moderate to severe CAS, the typical recommendation is two to three sessions per week at minimum, with some children benefiting from more intensive schedules. One session per week is generally considered insufficient for anything beyond mild CAS. Home practice between sessions is essential because motor learning requires high repetition that clinic time alone can't provide.

Is CAS the same as being a late talker?

No. A late talker is a child whose language development is delayed but whose underlying mechanism for speech production is intact. CAS is a motor speech disorder where the brain has difficulty planning and programming speech movements. Some late talkers catch up without intervention; children with CAS need specific, motor-learning-based therapy. A late talker who isn't progressing should be evaluated for CAS among other possibilities.

Will my child ever speak normally if they have CAS?

Many children with CAS develop functional speech with appropriate treatment, particularly those with mild to moderate severity who start therapy early and practice consistently. Severe CAS has a more variable prognosis. Some individuals continue to have residual speech differences into adulthood. Early, intensive, evidence-based treatment gives the best outcome, but it's honest to say results vary and there's no guaranteed outcome.

Does using AAC stop a child with CAS from learning to talk?

No. Current evidence, consistent with ASHA's position and Strand's clinical perspective, is that AAC use does not suppress speech development. For children with severe CAS who have limited verbal output, AAC gives them a way to communicate while speech develops, which cuts frustration and often supports more speech attempts. AAC and speech therapy work alongside each other, not against each other.

How is CAS different from a phonological disorder?

In a phonological disorder, the child has incorrect rules in their mental sound system but applies them consistently. In CAS, the problem is in motor planning, and errors tend to be inconsistent (the same word produced differently across attempts). Vowel errors and prosody problems are more common in CAS. The distinction matters because the two disorders require different treatments, and the wrong approach produces poor results.

Where can I find a speech therapist trained in Strand's CAS approach?

Apraxia Kids (apraxia-kids.org) keeps a directory of SLPs who have completed their CAS training workshops. Major children's hospitals and university speech-language clinics often have motor speech specialists. When you contact potential therapists, ask directly whether they use DTTC or another evidence-based motor speech treatment, and how many practice trials they target per session.

What role does home practice play in CAS treatment?

Home practice is central to CAS treatment, not optional. Motor learning requires a volume of repetition that weekly or twice-weekly sessions can't provide alone. Strand's approach explicitly involves parents running structured daily practice with targets and methods provided by the SLP. Five to fifteen minutes of daily focused practice is more effective than longer, infrequent sessions.

At what age can CAS be diagnosed?

CAS can be suspected as early as age two, but a reliable diagnosis is typically possible around age three, when a child has enough expressive language attempts to reveal the inconsistency patterns that mark the disorder. Some children are diagnosed later, especially if they've been misdiagnosed with a phonological disorder or if access to specialized evaluation was limited. Earlier evaluation and intervention consistently produce better outcomes.

Is CAS genetic or caused by brain injury?

CAS can be idiopathic (no identified cause), neurological (from a stroke, tumor, or brain injury), or associated with genetic or neurodevelopmental conditions including Down syndrome, fragile X syndrome, and galactosemia. Most children diagnosed with CAS have idiopathic CAS where no specific cause is found. Research into genetic factors is ongoing. Cause doesn't change the treatment approach much.

How do I know if my child's therapy is working?

Progress in CAS should be measurable. Your child's SLP should track accuracy on specific target words and sounds over time, with data collected each session. You should see rising accuracy on practiced targets within weeks, and generalization to unpracticed words over months. If there's been no measurable change after two to three months of consistent evidence-based therapy, ask for a re-evaluation of the diagnosis and approach.

Sources

1. Shriberg et al. (2019), Journal of Speech, Language, and Hearing Research - CAS prevalence: Estimated prevalence of CAS is approximately 1-2 per 1,000 children; true prevalence is uncertain due to diagnostic inconsistency
2. ASHA Practice Portal: Childhood Apraxia of Speech: ASHA lists three core diagnostic features of CAS and states co-occurring conditions do not preclude diagnosis; DTTC is listed among treatments with strongest research support
3. Strand, E.A. (2020), American Journal of Speech-Language Pathology - Dynamic Motor Speech Assessment: No single test definitively diagnoses CAS; the DMSA provides a structured protocol for gathering diagnostic data; therapy frequency recommendations for CAS
4. Strand & Skinder (1999), Clinical Management of Motor Speech Disorders in Children (Caruso & Strand, eds.) - DTTC development: DTTC was developed and described by Strand; published evidence supports its use for CAS treatment
5. ASHA Technical Report: Childhood Apraxia of Speech (2007): Formal technical report defining CAS diagnostic criteria and reviewing treatment evidence base
6. Apraxia Kids (CASANA) - Treatment approaches and parent resources: Apraxia Kids lists evidence-based treatments including DTTC, ReST, and Nuffield Dyspraxia Programme; maintains SLP training directory
7. Murray, McCabe & Ballard (2015), Journal of Speech, Language, and Hearing Research - ReST treatment evidence: Evidence for motor-learning-based CAS treatments in peer-reviewed literature; high trial repetition supports motor learning
8. ASHA - Augmentative and Alternative Communication Practice Portal: AAC use does not suppress speech development; AAC and speech therapy are complementary approaches
9. American Academy of Pediatrics - Developmental surveillance and screening guidance: AAP guidance on developmental surveillance and referral for speech concerns; early intervention improves outcomes
10. IDEA (Individuals with Disabilities Education Act) - Early intervention services (Part C): Federal law establishing eligibility for early intervention speech services for children birth to age 3 with developmental delays
11. Maassen (2002), Philosophical Transactions of the Royal Society B - Motor speech and CAS mechanisms: Review of motor planning mechanisms in CAS; distinction between CAS and phonological disorders at neural level