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- Written by: Natanael Dobra
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For a comprehensive explanation of the kinematic scoring logic, anatomical foundations, and the mathematical formula used to generate these rankings, please download the full framework:
Advanced Kinematic Word Databases
A Precision Tool for Speech Therapy
This section provides free, open-access word lists for every English consonant target sound, ranked by their Total Motor Score (TMS). This resource is designed to help anyone involved in speech therapy—including SLPs, assistants (SLPAs/CDAs), teachers, and parents—organize therapy using a logical progression from simple motor planning to complex sequencing.
Scoring Logic
The Total Motor Score (TMS) is a combined value based on five research-backed factors:
- Acquisition: Based on the typical age a child learns a sound (Early vs. Late).
- Articulation Place: The physical precision required for the sound’s position in the mouth.
- Vowel Kinematics: Scores the motor demand of the vowels (jaw grading and lingual movement).
- Groups: Group 1 (No consonant clusters) vs. Group 2 (Includes clusters).
- Word Shape: Structural patterns from simple (CV) to complex (CVCVC).
How to Use These Databases
The logic is intuitive: Low Score = Easier Motor Planning; High Score = Higher Motor Demand.
- Select a Target: Download the database for the specific consonant sound you are working on.
- Establish Success: Start with Group 1 words with the lowest TMS scores to build initial accuracy and confidence.
- Increase the Challenge: Progress to higher scores and Group 2 words (those containing clusters) to build motor stability and coordination.
Project Methodology & Sources
This database was processed in Python using a custom engine based on the Advanced Kinematic Framework. The following primary sources were used for data processing:
- Phonetic Source: CMU Pronouncing Dictionary
- IPA Conversion: eng-to-ipa Python library
- Document Generation: python-docx library
Open Science & Collaboration
- Python Scripts: To support researchers and developers, the original Python scripts are available for download. Use them to analyze custom lists or refine the kinematic logic.
- Accents: Transcriptions use a standard North American baseline; use the scores as a relative guide for regional dialects and accents.
- Improve the Model: This is a living project. Even with its structured logic, it is not perfect. We invite researchers and anyone interested in motor speech to use these tools for free, critique the script, and help us improve the model.
Click on a phoneme below to download the comprehensive word list and TMS rankings for that specific target sound:
/p, b, t, d, k, g/ (stops)
/f, v, θ, ð, s, z, ʃ, ʒ, h/ (fricatives)
/m, n, ŋ/ (nasals)
/l, r/ (approximants)
/w, j/ (glides)
/tʃ, dʒ/ (affricates)
For those interested in the technical framework or wanting to analyze custom word sets, the original Python analysis scripts are available for download.
Technical Note on the Word Rankings
This list has been organized using a specialized computational system that ranks word difficulty based on the motor-planning movements required for clear speech. Because English phonetics are exceptionally complex, no digital analysis is 100% perfect.
You may occasionally find a word where the phonetic symbols or the difficulty score seem unusual—this is simply a technical limitation of the analysis system. If a specific word appears to be an error, please skip it and proceed to the next one. This list is intended as a helpful guide to prioritize practice, with over 95% of the data providing a reliable path for speech development.
- File: TMS - f-motor-analysis-coarticulation.py
- File: TMS - v-motor-analysis-coarticulation.py
- File: TMS - θ-motor-analysis-coarticulation.py
- File: TMS - ð-motor-analysis-coarticulation.py
- File: TMS - s-motor-analysis-coarticulation.py
- File: TMS - z-motor-analysis-coarticulation.py
- File: TMS - ʃ-motor-analysis-coarticulation.py
- File: TMS - ʒ-motor-analysis-coarticulation.py
- File: TMS - h-motor-analysis-coarticulation.py
- File: TMS - p-motor-analysis-coarticulation.py
- File: TMS - b-motor-analysis-coarticulation.py
- File: TMS - t-motor-analysis-coarticulation.py
- File: TMS - d-motor-analysis-coarticulation.py
- File: TMS - k-motor-analysis-coarticulation.py
- File: TMS - g-motor-analysis-coarticulation.py
- File: TMS - m-motor-analysis-coarticulation.py
- File: TMS - n-motor-analysis-coarticulation.py
- File: TMS - ŋ-motor-analysis-coarticulation.py
- File: TMS - l-motor-analysis-coarticulation.py
- File: TMS - r-motor-analysis-coarticulation.py
- File: TMS - tʃ-motor-analysis-coarticulation.py
- File: TMS - dʒ-motor-analysis-coarticulation.py
- File: TMS - w-motor-analysis-coarticulation.py
- File: TMS - j-motor-analysis-coarticulation.py
Requirements: Python 3.x, eng_to_ipa, python-docx
Usage: This script automates the phonetic transcription and applies the 5-factor kinematic scoring to any Word document list.
Work in Progress
We are currently finalizing the data processing for the full consonant library. All TMS Databases and the Python Script are scheduled to be uploaded and available for free download by the end of January 2026.
Thank you for your patience as we prepare these precision tools for the community.
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- Category: English
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Guess the Veggie!
Guess the Veggie! is a vibrant, engaging game that brings vegetable identification to life through two exciting formats:
• A lively offline group activity for kids and adults
• A captivating solo online challenge
In the offline group version, one child or adult selects a vegetable by drawing a card from a colorful, downloadable PDF flashcard set (designed for printing and laminating to ensure durability and reusability). The guesser(s) ask clever yes-or-no questions about color, shape, taste, or texture to deduce the vegetable’s identity, earning one token per correct guess. The player with the most tokens wins. In team play, a facilitator selects a card, and each team gets one chance to guess. The team with the most correct guesses is declared the winner.
The solo online version, playable on smartphones or tablets, challenges players to identify the vegetable’s name using up to 10 descriptive clues. If the player does not guess correctly by the 10th clue, the vegetable’s name is revealed. The player must then type the name and press a check button to view the image before continuing to the next challenge.
Designed with simple, kid-friendly questions in mind, the offline version of Guess the Veggie! fosters curiosity, collaboration, and critical thinking—making it ideal for family gatherings, classrooms, or therapy sessions. The solo online version encourages independent focus and problem-solving for young players.
In educational settings, the offline game—featuring flexible, flashcard-based formats—enriches lessons on nutrition, plant science, and logical reasoning. Kids work together or create new games to expand their vocabulary. The online version reinforces solo learning through clue-based deduction.
In speech therapy, the offline version helps children build expressive and receptive language skills through structured question-asking and answering. The online version supports individual practice with clear, descriptive clues.
For children or adults with aphasia, the offline game’s vivid flashcards and the online version’s accessible clues and visual reveals provide engaging ways to practice word retrieval, sentence construction, and comprehension in a fun, supportive environment.
Whether played offline with laminated flashcards or solo online via the app, Guess the Veggie! invites players to explore a colorful world of vegetables—igniting curiosity and building joyful connections with every guess.
Vegetables
For Kids (Easy to Guess):
Potato, Carrot, Onion, Cucumber, Tomato, Bell Pepper, Broccoli, Cauliflower, Cabbage, Mushroom, Spinach, Corn, Pumpkin, Radish, Garlic, Celery, Lettuce
For Adults (Additional Challenges):
Zucchini, Green Beans, Peas, Eggplant, Beet, Kale, Asparagus, Turnip, Butternut Squash, Chili Pepper, Oregano
Approach
Kids’ Question Set (Offline Group Play):
Questions are straightforward and focus on observable traits like color, size, shape, texture (e.g., smooth, bumpy, leafy), taste, and whether the vegetable is eaten raw or cooked—tailored for young players.
Offline Gameplay Mechanics:
One player holds a flashcard and answers yes-or-no questions from the guesser(s), who use deduction to identify the vegetable. Correct guesses earn one token. The player or team with the most tokens wins.
In team play, a facilitator selects the card, and teams take turns guessing with one chance each per round. Players can also create variants such as timed speed rounds, acting out the vegetable, or matching flashcards to descriptions for added fun.
Online Solo Gameplay Mechanics:
The app provides up to 10 clues (e.g., “I am crunchy when raw” or “I grow underground”). Players can guess at any time. If no correct guess is made after the 10th clue, the name is revealed. The player must type it and press the check button to view the image and continue.
Creative Flexibility:
The flashcard set’s versatility allows players to invent new games like vegetable memory match or category sorting (e.g., group by color or growth type), making it adaptable for various settings and skill levels.
Therapeutic Value:
Both versions support language and cognitive development. Offline play encourages social interaction through customizable gameplay, while online play promotes independent focus and structured thinking.
Children’s Question Set – Examples (Offline Group Play)
- Is it green? – Identifies cucumber, spinach, broccoli, lettuce.
- Is it red? – Points to tomato, radish.
- Is it round? – Applies to potato, onion, tomato, cabbage, radish.
- Is it long? – Describes carrot, celery.
- Is it small? – Covers radish, garlic cloves.
- Is it bigger than your hand? – Includes pumpkin, cabbage.
- Is it leafy? – Identifies lettuce, spinach, cabbage.
- Is the skin smooth? – Applies to tomato, cucumber, bell pepper.
- Is the skin rough or bumpy? – Points to potato, broccoli.
- Is the skin edible? – Includes cucumber, tomato, bell pepper.
- Is it crunchy? – Describes carrot, celery, bell pepper, radish.
- Is it soft when cooked? – Applies to potato.
- Is it spicy? – Points to chili pepper.
- Is it sweet? – Includes corn, carrot.
- Is it bitter? – Suggests turnip.
- Does it grow underground? – Covers potato, carrot, onion, garlic, radish.
- Does it grow on a vine? – Includes tomato, cucumber.
- Does it grow on a stalk? – Applies to corn, celery.
- Is it used in salads? – Points to lettuce, cucumber, tomato, bell pepper.
- Is it used in soups? – Includes potato, carrot, onion, celery.
- Does it smell strong? – Suggests onion, garlic.
- Is it eaten raw? – Applies to carrot, cucumber, lettuce, bell pepper.
- Is it an herb? – Identifies oregano.
Vegetable Identification Example (Offline Group Play)
Potato – Sample Questions and Answers:
- Is it round? – Yes
- Does it grow above the ground? – No
- Does it grow underground? – Yes
- Is it white or yellow inside? – Yes
- Is the skin rough? – Yes
- Is it soft when cooked? – Yes
- Is it used in soups? – Yes
- Can you fry it? – Yes
- Is it a potato? – Yes
- …
Download “Guess the Veggie! – Flashcard set” to print and laminate for endless offline group fun with creative game variants, or dive into the solo online challenge with the “Guess the Veggie!”

Guess the Veggie! - Solo Play --- Tap the picture to start playing!
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Download the full article " Practical Insights for Motor Speech Disorders (MSD) ".
Practical Insights for Motor Speech Disorders (MSD)
- Use Non-Speech Gestures as Cues to Support (Facilitate) Speech Sounds
Non-speech gestures such as “blowing out a candle” can help transfer motor patterns to speech production, especially for rounded vowels like /u/. For example, after or while practicing blowing, encourages the client to produce the vowel /u/ or moo (as in “moon”), which shares similar lip rounding and oral posture.
Hand opens like a pop – to cue plosive sounds like /p/, /b/, etc. (e.g., "pop")
Hands pressed together then burst apart – cue for stop (plosive) sounds like /p/, /b/, /t/, /d/, /k/, /g/ (e.g., "cup").
Finger to lips – to cue lip closure for bilabials like /m/, /p/, /b/ (e.g., "mom")
Index placed vertically in front of the lips, mimicking the “shh” silence gesture – to cue long fricatives like /ʃ/ in "shoe"
Finger to throat – to increase awareness of voicing in voiced sounds (e.g., /b/ vs. /p/)
"Snake" motion with hand – continuous movement to cue /s/ (e.g., "sun")
Finger to nose – cue for nasal consonants like /m/, /n/ (e.g., "no")
Fingers “walking” backward – cue for back-of-mouth sounds like /k/ or /g/ (e.g., "go")
Fingers “walking” forward – cue for front-of-mouth sounds like /t/, /d/ (e.g., "top")
Hands spreading wide – to model wide oral opening for low vowels (e.g., /ɑ/ in "sock")
- Consider Manner of Articulation When Choosing Target Sounds
Stops (/p/, /t/, /k/) are generally easier to produce than fricatives (/s/, /f/), and fricatives are easier than affricates (/ʧ/, /ʤ/), especially when respiratory support is reduced.
Nasals (/m/, /n/) tend to be easier than fricatives and affricates if palatal closure is weak or inconsistent.
- Target Easier Sounds Based on Palatal Closure and Word Shape, Not Isolated Sounds
When palatal closure is weak, nasals, vowels, and glides are easier to produce than consonants requiring intraoral pressure. However, these target sounds should be practiced within syllables and words, not just in isolation, because motor planning depends on co-articulation and word shape. Articulation drills should emphasize movement and syllable transitions, not fixed tongue or lip positions.
- Use Phonetic Context to Facilitate or Challenge Articulation
The sounds surrounding a target (phonetic environment) influence accuracy through co-articulation effects. For example, alveolar consonants (/t/, /d/, /n/) are easier next to high vowels like /i/ (“tea”) because the tongue is already raised forward. Conversely, jaw-open vowels (/ɑ/) may retract the tongue, making alveolar sounds harder.
Always consider phonetic context and word shape when selecting stimuli.
- Be Aware That Syntactic Complexity Impacts Motor Performance
Speech production is both motor and cognitive. Increased linguistic complexity (longer or more complex sentences) requires more cognitive resources for word retrieval and syntax, which can detract from motor planning. Clients with CAS or AOS might say a word correctly in isolation but struggle in sentences due to sequencing demands.This is why the approach begins not with isolated sounds but with target sounds in monosyllabic words, then gradually increases complexity through disyllabic and polysyllabic words, increasing linguistic load as motor control improves.
- Address Morphological Complexity Gradually
Morphologically complex words (e.g., 'jumping' or 'reopening') contain more morphemes, often resulting in additional syllables and phonemes, which increases motor planning demands. Introduce morphological elements step by step—from simple root words to words with prefixes or suffixes—to gradually build motor planning skills.
- Use Minimal Contrast Pairs to Reduce Motor Demands Early On
Begin with minimal or near-minimal pairs that differ by just one phonological feature (e.g., 'pea' vs. 'bee') to support early motor planning. Then progress to pairs like 'top' vs. 'cop,' which differ by both place and voicing. Once consistent control is established, introduce maximal oppositions—word pairs that differ by multiple phonological features (e.g., ship" vs. "lip,' differing in place, manner, and voicing)—to further challenge and expand the child's motor speech repertoire.
- Use Words Differing by One Sound to Build Complexity
For example, target /st/ cluster starting from the word “top” by adding /s/ “stop” to help transition from monosyllabic words without clusters to those with consonant clusters, gradually increasing motor complexity.
- Incorporate Right-Hand Movements to Support Speech Motor Planning
Moving the right hand during speech practice may improve articulation because, in most individuals, the left hemisphere—which predominantly controls language functions—also controls the right hand. Crucially, brain areas such as Broca’s area and the premotor cortex are involved in both speech motor planning and hand movement coordination. Engaging the right hand during speech exercises activates these overlapping regions simultaneously, strengthening neural connections and supporting more precise motor planning and production. Sensorimotor integration theories suggest that coupling speech with hand movements facilitates motor learning by engaging shared neural circuits, which may enhance articulation skills.
Note: Broca’s area is usually in the left hemisphere for ~95% of right-handed and ~70% of left-handed people. For others, brain organization varies.
- Encourage Mental Practice Outside Therapy Sessions
Ask clients to imagine producing target sounds before sleep or during quiet times. Although this mental rehearsal does not involve physically producing speech, it activates many of the same brain regions responsible for motor planning, such as the premotor cortex and supplementary motor area. By mentally simulating the movements required for speech, these motor planning areas are engaged and reinforced without actual execution. This activation helps strengthen neural connections involved in planning and coordinating speech movements, supporting motor learning and improving speech production over time. Combining mental rehearsal with visualization of articulator movements—such as imagining the tongue, lips, or jaw moving to produce the sound—can further engage sensory and motor regions, enhancing the precision and effectiveness of the motor plan. Mental rehearsal, paired with vivid articulatory imagery, leverages the brain’s ability to simulate and refine speech actions internally, making it a valuable adjunct to active speech practice, especially when physical practice is limited
- Prefer Meaningful Stimuli Over Nonsense Syllables for CAS/AOS
Meaningful words and phrases are more motivating and effective for motor planning practice in CAS/AOS than nonsense syllables, which are more common in articulation disorder therapy.
- Use Compensatory Strategies for Motor Limitations
When a specific articulator (like the tongue tip) has limited control, encourage alternative strategies that enable clearer speech production. For example, for the /s/ sound, if tongue tip control is weak, the speaker can produce /s/ with the tongue tip down—sometimes even touching the lower front teeth—while raising the tongue blade to create the necessary airflow and sound clarity. Being creative and flexible in identifying such compensations can help improve clarity across multiple speech sounds, not just one. Tailoring compensatory approaches to each individual's motor abilities supports functional communication despite underlying limitations
- Use Over-Enunciation and Exaggerated Mouth Movements
Exaggerated movements enhance sensory feedback by increasing visual cues, tactile sensations, and proprioceptive input. This heightened feedback helps clients better see and feel the precise articulatory targets they need to achieve, which is critical for refining their speech movements. Such amplified sensory information supports motor learning by reinforcing accurate motor plans and correcting errors. This approach is especially beneficial for individuals with poor internal models of movement—common in conditions like Childhood Apraxia of Speech (CAS) and Apraxia of Speech (AOS)—where the brain’s ability to predict and monitor speech movements is impaired
- Slow Speech Rate to Support Motor Planning and Accuracy
Slower, controlled speech gives more time for planning and executing movements and allows focus on accurate transitions between sounds and syllables, which are often impaired in CAS and AOS.
- Base Therapy on Phonetic Syllables, Not Written Syllables
In Childhood Apraxia of Speech (CAS) and Apraxia of Speech (AOS), syllables are fundamental motor units that are planned and executed in real time based on how speech sounds are physically produced, rather than how they are written or divided by orthographic or morphological rules. This distinction is important because orthographic syllabification (how words are split in writing) often does not align with actual articulatory patterns in spoken language. For example, written syllable breaks may separate consonants that function as onsets in natural speech, causing confusion when used in therapy. Therefore, speech therapy should focus on phonetic syllable structures—such as consonant-vowel (CV) or consonant-vowel-consonant (CVC)—which reflect the real motor demands of producing sounds. This approach simplifies motor planning by targeting syllable shapes as they naturally occur in speech, making it especially effective for clients with CAS/AOS who struggle with sequencing and timing of speech movements. Using phonetic rather than orthographic syllabification helps therapists create clearer, more accurate, and developmentally appropriate targets for speech motor learning.
Note: For more detail, see my article “Why I Chose Phonetic Syllabification for Speech Therapy.”
- Adjust Targets for Clients with Atypical Sound Acquisition Patterns
Some clients produce later-acquired sounds like /s/ or /l/ before earlier-developing sounds such as /p/ or /n/. This unexpected pattern does not always reflect true underlying motor ability but may instead relate to differences in sensorimotor access, compensatory strategies, or individual variations in how the speech system is organized and recruited. In these cases, it’s essential to look beyond typical developmental norms and consider how accurately and consistently each sound is produced in the child’s current speech system. A sound that is traditionally labeled as “complex” may, in practice, be more stable and accessible for a given client. For example, if /s/ is consistently produced clearly and with minimal effort, it can be treated as an “easy” sound for therapy purposes—even if it is typically considered a late-acquired, high-complexity sound. This individualized, performance-based approach allows for more effective and tailored treatment planning.For more detail and examples, see my article Oral Motor Complexity Score.
- Focus on Underlying Motor Planning, Not Just Articulation of Individual Sounds
In motor speech disorders like Childhood Apraxia of Speech (CAS) and Apraxia of Speech (AOS), progress hinges on improving the child’s overall motor planning abilities—not simply achieving correct production of individual speech sounds. These disorders involve difficulty in programming and sequencing the movements needed for fluent, accurate speech, which means that even sounds a child can produce correctly in isolation may break down in longer utterances or varied contexts. If therapy focuses only on isolated phonemes without systematically addressing the underlying motor planning deficit, progress will often be slow, inconsistent, or plateau prematurely. Targeting the root cause—motor planning and the smooth transition between speech movements—is essential for meaningful, lasting improvement in functional communication.
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Childhood Apraxia of Speech: Understanding and Practicing with Our Resources
Childhood Apraxia of Speech (CAS) is a motor speech disorder where children struggle to plan and coordinate the movements needed for clear speech, despite normal muscle strength. Children with CAS may produce inconsistent speech errors, struggle with sequencing sounds, or have difficulty imitating words. They often start with simple word shapes (e.g., “bee”) and progress to complex ones (e.g., “brick”). In adults, Apraxia of Speech (AOS), typically caused by stroke or brain injury, involves similar challenges in coordinating speech movements.
Our website is developing a dedicated section for CAS and AOS, featuring evidence-based tools to support speech practice and progress. Currently under construction, this section will include structured speech therapy worksheets organized by articulatory complexity, starting with simple words like “bee” and advancing to complex words like “brick.” You’ll also find interactive flashcards to reinforce learning and online apps for flexible, at-home practice. Designed for speech-language pathologists (SLPs) and caregivers, these resources aim to make therapy engaging and effective.
Check back weekly for updates as we build this section. Explore these tools to support your CAS or AOS therapy journey with confidence!
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- Written by: Natanael Dobra
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Motor Speech Disorders: Understanding and Practicing with Our Resources
Motor speech disorders affect the ability to plan, coordinate, and execute the movements needed for clear speech. These disorders, caused by neurological conditions, impact muscle control for speaking, leading to challenges in articulation, fluency, or voice. Common examples include Childhood Apraxia of Speech (CAS), where children struggle to plan precise speech movements, resulting in inconsistent errors, and dysarthria, often seen in adults or children with conditions like cerebral palsy or stroke, causing slurred or unclear speech due to muscle weakness or poor coordination.
Our website is developing a dedicated section to support individuals with motor speech disorders, featuring evidence-based tools to practice and improve speech. This section, currently under construction, will include structured speech therapy worksheets, organized by articulatory complexity, to target specific sounds and skills, from simple words like “bee” to complex ones like “brick.” You’ll also find interactive flashcards to reinforce learning, online apps for flexible, at-home practice, and additional resources to guide speech-language pathologists (SLPs) and caregivers. These tools are designed to make therapy engaging and effective, empowering users to progress at their own pace.
The motor speech disorders section is still being built, so check back weekly for new resources and updates. Visit regularly to access these tools, practice with confidence, and support your speech therapy journey!
