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30-Word ProbeFree in-browser calculator

Articulation Screener.

Tick errored sounds on a 30-word single-word probe covering every English consonant. Enter the child age and the tool flags each errored sound against the McLeod & Crowe (2018) 90% ages of mastery — headline pass / at-cusp / refer decision in one keystroke.

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Validated2026-04-06
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Tick each errored sound

Elicit each target word, then tick the box beside every sound position where the child produced an error (substitution, omission, or distortion). Enter the child age to get an automatic pass / refer decision against the McLeod & Crowe (2018) 90% ages of mastery.

0 / 63 targets ticked
1
pig
animal
2
ball
toy
3
mom
family
4
no
everyday
5
hat
clothing
6
water
drink
7
dog
animal
8
top
toy
9
cat
animal
10
go
action
11
ring
object
12
fish
animal
13
van
vehicle
14
yes
everyday
15
leaf
nature
16
shoe
clothing
17
chip
food
18
jump
action
19
sun
nature
20
zoo
place
21
red
color
22
thumb
body
23
bathtub
object
24
feather
object
25
measure
action
26
banana
food
27
kitten
animal
28
pencil
school
29
five
number
30
spoon
object

Legend — I initial, M medial, F final. Tap a sound-position to mark it errored. Dialect features (th-stopping, /r/-vocalisation, /t/-glottalisation) should NOT be ticked.

Tick every sound-position where the child produced an error, then enter the child age to see the pass / refer decision.

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When to use

  • SLP caseload intake — decide whether a new referral needs a full articulation evaluation
  • Well-child paediatric visits — flag children who need a speech referral
  • Classroom speech/language screening — quick 3-minute probe per child
  • IEP re-evaluation — confirm which sounds are still in error
  • Graduate SLP student training — practice sound-by-position error transcription
  • Parent/teacher intake forms — tick errored sounds on a printable probe sheet before the SLP visit

Do not use for

  • As a substitute for a norm-referenced articulation test (GFTA-3, Arizona-4, CAAP-2)
  • For children with diagnosed hearing loss, cleft palate, or apraxia of speech — these follow different developmental trajectories
  • For dialect speakers without dialect-specific norms — many "errors" are dialect features, not speech sound disorder
  • For bilingual children without cross-language transfer considerations
  • As the only source for IEP articulation goals — pair with a full evaluation and a connected-speech sample
  • For vowel errors or prosody — the screener is consonant-focused

Single sound delayed = refer, don't wait

A single clearly delayed sound (child past the McLeod & Crowe 2018 age of mastery) is enough to refer for a full evaluation. The screener does not ask for a composite score because composite scores on brief probes are noisy. One clearly delayed sound is a more reliable refer signal than a borderline composite, and the cost of a missed referral (speech delay untreated until kindergarten) is far higher than the cost of a full evaluation that turns out to pass.

Dialect features are not errors

Th-stopping ("dis" for "this"), /r/-vocalisation ("cah" for "car"), and final /t/ glottalisation are features of African American English, Southern English, Caribbean English, and many UK dialects — they are not articulation errors and should NOT be ticked on the screener. Always verify the child's home dialect before scoring, especially when the family is from a community where the "errored" feature is the dialect norm. McLeod & Crowe (2020) is the current cross-linguistic reference for dialect-sensitive articulation screening.

One screener is a sample, not a diagnosis

A single 30-word probe gives you maybe 90 to 110 phoneme opportunities — enough to flag an obviously delayed sound, but not enough to confirm a stable error pattern. Before writing goals, confirm every flagged sound on a full articulation test or a second screening 2 to 4 weeks later. A child who is tired, shy, or in a new clinical setting often produces one-time errors that disappear on the second elicitation.

Pair with a phonological process check

Many "articulation errors" are actually phonological processes — a child who says "tat" for "cat" and "do" for "go" is not making two unrelated errors, they are applying velar fronting as a phonological rule across multiple targets. Pair this screener with the ConductScience Phonological Process Identifier to check whether the error pattern fits one of the twelve common English processes. Process-level intervention (cycles approach, minimal pairs) is typically more efficient than sound-by-sound articulation drill when the child has a phonological pattern.

90% mastery, not 50% or 75%

The screener uses the McLeod & Crowe (2018) 90% cross-linguistic pooled age of mastery. Older acquisition charts sometimes report 50% or 75% ages, which are systematically younger and produce false-negative referrals for late-acquiring sounds like /r/, /ʒ/, and /θ/. Stick with the 90% standard when making referral decisions — it is the current evidence-based cut-off used in speech-language pathology practice.

1

Method

The screener presents 30 single-word targets picked to sample every English consonant (/p, b, m, t, d, n, k, g, ŋ, f, v, s, z, ʃ, ʒ, θ\theta, ð, tʃ, dʒ, h, w, j, l, ɹ/) in at least one word position (initial, medial, final). The word list is modelled on the Goldman-Fristoe Test of Articulation 3 sounds-in-words structure and the Iowa-Nebraska Articulation Norms (Smit et al. 1990), with /r/, /l/, and /θ/ coverage drawn from the Arizona Articulation and Phonology Scale 4. Each word is picturable, developmentally early (typical receptive vocabulary of a 3-year-old per the MacArthur-Bates CDI), and has been checked against McLeod & Crowe (2018) Table 6 for consonant mastery ages. For every target the tool exposes a sound-by-position checkbox grid; the clinician ticks every sound the child produced in error. The tool then lists every errored consonant, compares each against the McLeod & Crowe (2018) 90% cross-linguistic pooled age of mastery, and returns a pass / at-cusp / refer headline based on whether any errored sound is past its mastery age. The screener is built for fast triage (caseload intake, well-child visits, classroom screening, IEP re-evaluation) and is not a substitute for a full norm-referenced articulation test.

2

Validated

Last validated 2026-04-06. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

3

How to cite

How to Cite

ConductScience Articulation Screener (v1.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/articulation-screener

McLeod S, Crowe K. Children's consonant acquisition in 27 languages: A cross-linguistic review. American Journal of Speech-Language Pathology. 2018;27(4):1546-1571. doi:10.1044/2018_AJSLP-17-0100

Smit AB, Hand L, Freilinger JJ, Bernthal JE, Bird A. The Iowa Articulation Norms Project and its Nebraska replication. Journal of Speech and Hearing Disorders. 1990;55(4):779-798. doi:10.1044/jshd.5504.779

Goldman R, Fristoe M. Goldman-Fristoe Test of Articulation (3rd ed.). Pearson; 2015.

Fudala JB. Arizona Articulation and Phonology Scale (4th ed.). Western Psychological Services; 2017.

Bowen C. Children's Speech Sound Disorders (2nd ed.). Wiley-Blackwell; 2015.

What Is an Articulation Screener?

An articulation screener is a short single-word probe used to decide whether a child needs a full articulation evaluation. Unlike a norm-referenced test like the Goldman-Fristoe Test of Articulation 3 (53 target words, ~30-minute administration, standardised scoring) or the Arizona Articulation and Phonology Scale 4 (72 target words, composite severity score), a screener samples only a handful of targets — usually 20 to 50 — and gives a fast pass / refer answer. Screeners are the standard intake tool for preschool well-child visits, classroom speech screenings, SLP caseload triage, and IEP re-evaluations.

Two questions drive every screener. (1) Did the child produce any errors? (2) If yes, is each errored sound past its typical age of mastery? The second question is the whole point of a screener — a three-year-old who says "wabbit" for "rabbit" has a developmentally normal error and should NOT be flagged, while a six-year-old producing the same error has a delayed sound that warrants a full evaluation. The ConductScience screener asks both questions automatically once the child age is entered.
How this screener works. The tool presents 30 single-word targets picked to cover every English consonant in at least one position (initial, medial, or final). For each word the clinician ticks the error box beside every sound the child produced incorrectly. The tool then lists every errored consonant, compares each against the McLeod & Crowe (2018) 90% age of mastery, and flags the child pass, at-cusp, or refer. The full word list with target positions is visible inside the tool so you can use it as a printable probe sheet in the clinic room or on the iPad.

The 30-Word Target List

The 30-word list is modelled on the Goldman-Fristoe Test of Articulation 3 sounds-in-words structure and the Iowa-Nebraska Articulation Norms (Smit et al. 1990 / 1990 IA-NE), plus /r/, /l/, and /θ/ coverage drawn from the Arizona Articulation and Phonology Scale 4. The criteria for inclusion were:

Coverage. Every English consonant (/p, b, m, t, d, n, k, g, ŋ, f, v, s, z, ʃ, ʒ, θ\theta, ð, tʃ, dʒ, h, w, j, l, ɹ/) is sampled in at least one position, and the 20 most clinically targeted sounds are sampled in two or three positions.
Picturability. Every target is a concrete noun or a short picturable phrase so the word list can be elicited from a 3-year-old without a picture book or presented as a reading probe to a school-age child.
Developmental appropriateness. Every target is in the typical receptive vocabulary of a 3-year-old (MacArthur-Bates CDI / Dale & Fenson 1996).
Position sampling. Initial and final positions are sampled for every consonant where English phonotactics allow. Medial positions are sampled when they are clinically informative (e.g. intervocalic /t/ for flapping, medial /ŋ/ for nasal place).

The full list is inside the screener. Use the list as a printable probe sheet for a three-minute in-clinic screening, or as a reading probe for an SLP intake visit.

How to Score the Screener

For each target word, listen to the child's production and tick the error box beside every sound position where the child produced a consonant in a way that would be flagged on a single-word articulation test. Count the following as errors:

Substitutions. The child produced a different consonant than the target (e.g. "tat" for "cat" — /k/ → /t/ substitution).
Omissions. The child dropped the target consonant entirely (e.g. "ca" for "cat" — /t/ omission in final position).
Distortions. The child produced an unusual variant of the target consonant that would not be transcribed with a different IPA symbol but does not sound age-appropriate (e.g. a lateral /s/ or a frictionless /r/).
Additions. The child added a consonant that is not in the target (e.g. "stop" → "stops" in a reading probe). Additions are rare in single-word probes and are usually a sign of a separate morphological or literacy error rather than an articulation error.
  • Dialect features (th-stopping, /r/-vocalisation, rounding of /ɹ/ — these are African American English, Southern English, and other dialect variants, not errors)
  • Vowel errors (the screener is consonant-focused; vowel errors go in a separate probe)
  • Prosody, rate, or fluency issues (those go in the voice or fluency screeners)

The tool totals the errored sounds automatically, groups them by word position, and flags each errored sound against the McLeod & Crowe (2018) age of mastery.

The Pass / Refer Rule

The screener uses a single-sound age-of-mastery rule for the pass / refer decision, not a standardised total score. The rule:

Pass. Every errored sound is age-expected — the child is younger than the McLeod & Crowe (2018) 90% age of mastery for every errored sound. The screener returns "pass" and the clinician re-screens at the next visit.
At cusp. At least one errored sound is within ±3 months of the McLeod & Crowe (2018) 90% age of mastery, and no sound is clearly past its age of mastery. The screener returns "at cusp" and the clinician re-screens in 3 months or adds a stimulability check in the current session.
Refer. One or more errored sounds are past the McLeod & Crowe (2018) 90% age of mastery. The screener returns "refer" and the clinician follows up with a full articulation evaluation (GFTA-3, Arizona-4, CAAP-2) before writing IEP goals.
Why the single-sound rule. The screener deliberately avoids a composite score because composite scores on brief probes are noisy (ICC typically below 0.70 for word lists under 30 targets). A single clearly delayed sound is a more reliable refer signal than a borderline composite. For children with many errors, pair the screener with a full GFTA-3 or Arizona-4; the screener is not meant to substitute for a normative test. For suspected phonological disorder (pattern across many targets), add a phonological process analysis — the ConductScience Phonological Process Identifier is the companion tool.

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Next steps

Protocol

Speech Sound Development Chart — age of acquisition for the 24 English consonants

Reference protocol for the next planning step.

Read guide Protocol

Phonological Process Identifier — match single errors against the twelve common processes

Reference protocol for the next planning step.

Read guide Protocol

Brown's Stages Lookup — pair articulation with grammatical milestones

Reference protocol for the next planning step.

Read guide Protocol

MLU Calculator — pair the sound-level screener with an expressive-language sample

Reference protocol for the next planning step.

Read guide