What Tests Are in a Speech Evaluation? Common Assessment Tools Explained

The Tests Behind Your Child's Speech Report

A comprehensive speech-language evaluation isn't one test — it's a battery of assessments selected based on the referral concerns. Each instrument measures a different dimension of communication. When you understand what each test does, you can read the evaluation report with clarity instead of confusion, and you can spot when a critical area was left unassessed.

Comprehensive Language Batteries

CELF-5 (Clinical Evaluation of Language Fundamentals, 5th Edition). Ages 5–21. The most widely used comprehensive language test in schools. Produces a Core Language Score plus index scores for receptive language, expressive language, language content, and language structure (ages 5–8) or language memory (ages 9–21). Subtests include Following Directions, Formulated Sentences, Recalling Sentences, Word Classes, and Understanding Spoken Paragraphs. This is typically the primary instrument in a school evaluation. If only one formal test was administered, it was probably the CELF-5.

CASL-2 (Comprehensive Assessment of Spoken Language, 2nd Edition). Ages 3–21. Measures spoken language across lexical, syntactic, supralinguistic, and pragmatic domains without requiring reading or writing. Useful when the evaluator wants to assess pragmatic language (social communication) within a comprehensive battery. Minimizes motor demands, making it a strong choice for children with motor-speech involvement.

OWLS-II (Oral and Written Language Scales, 2nd Edition). Ages 3–21. Uniquely measures the connection between oral language and written language — listening comprehension, oral expression, reading comprehension, and written expression. Useful for older students where the concern is how oral language deficits affect academic literacy.

PLS-5 (Preschool Language Scales, 5th Edition). Birth through 7;11. Designed for young children, with play-based materials for the youngest ages. Produces Auditory Comprehension and Expressive Communication scores. If your child was evaluated before age five, this or the CELF Preschool-3 was likely used.

Vocabulary Tests

PPVT-5 (Peabody Picture Vocabulary Test, 5th Edition). Ages 2;6 to 90+. Measures receptive vocabulary — your child hears a word and points to the matching picture from four options. Quick to administer (10–15 minutes) and widely used, but it measures only single-word vocabulary comprehension. A strong PPVT-5 score does not mean language is intact — it means the child recognizes individual words.

EVT-3 (Expressive Vocabulary Test, 3rd Edition). Ages 2;6 to 90+. The expressive counterpart to the PPVT-5. Your child labels pictures or provides synonyms. Together, the PPVT-5 and EVT-3 reveal whether a gap exists between words your child understands and words they can produce.

Articulation and Phonology Tests

GFTA-3 (Goldman-Fristoe Test of Articulation, 3rd Edition). Ages 2–21. Measures how accurately your child produces speech sounds in single words — initial, medial, and final positions. The SLP records substitutions, omissions, and distortions. Often paired with the KLPA-3 to identify phonological error patterns.

KLPA-3 (Khan-Lewis Phonological Analysis, 3rd Edition). Analyzed from the same responses as the GFTA-3. Identifies systematic error patterns (fronting, stopping, cluster reduction) that indicate a phonological disorder rather than isolated articulation errors. The distinction affects the therapy approach.

Arizona-4 (Arizona Articulation and Phonology Scale, 4th Edition). Ages 1;6 to 21. Provides a severity score for overall speech sound accuracy in single words and connected speech. Some evaluators prefer it for its quantified intelligibility metric.

Motor Speech and Apraxia Assessments

DEMSS (Dynamic Evaluation of Motor Speech Skill). Ages 3–9+. A dynamic assessment specifically designed to diagnose Childhood Apraxia of Speech (CAS). Tests word shape repetition, articulatory accuracy, and prosodic control. Unlike static tests, it evaluates how the child responds to cueing — a key diagnostic feature of CAS.

No single standardized test score diagnoses apraxia. Diagnosis requires clinical observation of three core features: inconsistent consonant and vowel errors on repeated productions, disrupted coarticulation between sounds and syllables, and inappropriate prosody (stress patterns). If your child's report says "apraxia" or "suspected CAS" but doesn't describe these features, ask how the diagnosis was determined.

Pragmatic and Social Communication Tools

CCC-2 (Children's Communication Checklist, 2nd Edition). Ages 4–16. A caregiver-completed rating scale that evaluates pragmatic language, structural language, and autistic traits. Particularly useful for differentiating Developmental Language Disorder from Social (Pragmatic) Communication Disorder and Autism Spectrum Disorder.

CELF-5 Pragmatics Profile. A supplementary checklist within the CELF-5 that assesses social communication skills — turn-taking, topic maintenance, nonverbal cues, contextual politeness. Not a standardized test with a standard score, but a structured observation tool that captures functional social communication.

Informal Measures That Should Be Included

A comprehensive evaluation includes more than standardized tests:

• Language Sample Analysis (LSA): Recording and analyzing spontaneous speech. Yields Mean Length of Utterance, Number of Different Words, and Percentage of Grammatical Utterances — data that standardized tests cannot capture.
• Dynamic Assessment: Test-teach-retest to evaluate learning potential. Critically important for bilingual children and dialect speakers, where low standardized scores may reflect language difference rather than language disorder.
• Classroom Observation: The evaluator watches your child in the actual classroom environment to document functional communication breakdowns.

IDEA evaluations must use a variety of assessment tools and strategies and may not rely on a single measure as the sole criterion for eligibility. If your child's evaluation included only one or two standardized tests and no informal measures, ask how the team considered language samples, observations, and functional impact. The Speech-Language Evaluation Decoder covers every test listed here with score interpretation guides, explains what should and shouldn't have been included, and provides scripts for requesting additional assessment when key areas were missed.