What is the CREVT-3? PRO-ED's receptive and expressive vocabulary test
The CREVT-3 is PRO-ED's individually administered oral vocabulary test for ages 5 to 89. What it measures, how it is scored, and why it is not an IQ test.
Dr. Russell T. WarneChief Scientist
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The CREVT-3, or Comprehensive Receptive and Expressive Vocabulary Test, Third Edition, is a norm-referenced measure of spoken word knowledge published by PRO-ED and written by Gerald Wallace and Donald D. Hammill. A single examiner gives it one-on-one to a person aged 5 through 89, usually a speech-language pathologist, special educator, school psychologist, or educational diagnostician, and it takes 20 to 30 minutes. It is not an IQ test. It reports how much oral vocabulary a person has relative to same-age peers and produces no measure of reasoning, memory, or processing speed. Clinicians often pair it with a cognitive battery as a companion measure, because oral vocabulary and verbal IQ overlap heavily, and a vocabulary score alone cannot tell you whether a low result reflects general ability, limited language exposure, or a language disorder. This article covers the test's structure, scoring, norms, and how honestly to read a vocabulary score against an IQ score.
What the CREVT-3 measures
The test covers oral vocabulary in two directions. "Receptive" vocabulary is what a person understands when they hear a word. "Expressive" vocabulary is what a person can produce and explain themselves. PRO-ED sells the CREVT-3 for four stated purposes: identifying people who are significantly behind their peers in oral vocabulary, noting discrepancies between the receptive and expressive sides, documenting progress during an intervention program, and measuring vocabulary in research.
• Receptive Vocabulary: This 76-item subtest uses the familiar point-to-the-picture format, with one design choice that sets the CREVT-3 apart from most of its competitors. Instead of line drawings, it uses full-color photographs arranged in themed plates. There are 10 plates of six photographs each, and every plate holds together around one theme: animals, transportation, occupations, clothing, food, personal grooming, tools, household appliances, recreation, and clerical materials. The examiner says a word, the person points to the matching photograph, and after two consecutive misses the examiner moves on to the next plate. Five to eight words attach to each plate, spread by difficulty from young children through adults.
• Expressive Vocabulary: This 29-item subtest uses the define-the-word format, the same approach the Wechsler scales use for their Vocabulary subtest. The examiner says a word and the person explains what it means, at whatever length they choose. The items draw on the same 10 themes as the receptive subtest, so the transition feels continuous, and basal and ceiling rules keep administration short across a wide age range.
The two subtests combine into one composite, the General Vocabulary Index, which PRO-ED describes as representing overall ability in oral vocabulary. Nothing in the test asks a person to reason about relationships, hold information in mind, or solve a novel problem. For a broader treatment of the format family, our guide to what vocabulary tests actually measure covers how word knowledge is tested and why.
How the CREVT-3 is administered and scored
Administration is individual and face to face. The complete kit contains an Examiner's Manual, the Photo Album Picture Book holding the laminated plates, and 25 record booklets for each of two equivalent forms, Form A and Form B. PRO-ED currently lists the kit at $402 and also sells digital versions of the manual and picture book. Two parallel forms matter for progress monitoring, since a clinician can retest after an intervention without the person having just seen the same photographs.
Raw scores convert to age equivalents, standard scores, percentile ranks, and descriptive terms. The publisher states that the composite score has neither floor nor ceiling effects, which in practice means the index can distinguish among people at both extremes of the distribution rather than bottoming out or topping out. PRO-ED added a pronunciation guide for both subtests in this edition, and replaced photographs that had aged badly, including images of an automobile, a truck, a mail carrier, a vacuum cleaner, a shaver, and a stove.
One detail worth understanding is who is allowed to buy it. PRO-ED classifies the CREVT-3 as qualification Level A, which the publisher defines as requiring no special qualifications to purchase. Purchase eligibility and interpretive competence are separate questions. PRO-ED's own qualifications policy defines the test "User" as the person who assumes responsibility for administration, scoring, interpretation, and application of results, and states that the company follows the Standards for Educational and Psychological Testing published jointly by the American Educational Research Association, the American Psychological Association, and the National Council on Measurement in Education. A score means very little in the hands of someone who cannot situate it in a person's language history.
What the publisher reports about the norms
The CREVT-3 carries a 2013 copyright. According to PRO-ED, the third edition was normed on an entirely new sample of 1,535 people, demographically representative of the 2011 United States population, covering ages 5-0 through 89-11. That span is unusually wide for a vocabulary measure and is part of why the instrument shows up in adult rehabilitation and geriatric work as well as in schools.
The publisher reports that reliability coefficients were computed by age and separately for gender, ethnic, racial, and exceptionality subgroups within the normative sample, and that validity work for this edition includes sensitivity, specificity, and receiver operating characteristic analyses. PRO-ED also says the bias studies from earlier editions were expanded. Those are the right categories of evidence to look for, though the catalog page publishes no coefficient values, so anyone evaluating the test should read the Examiner's Manual rather than the marketing copy.
Independent review exists. The Buros Center for Testing at the University of Nebraska-Lincoln lists a CREVT-3 review published in the Twentieth Mental Measurements Yearbook and gives the test's publication history as 1994 to 2013, reflecting three editions across nearly two decades. As of this writing the third edition is current; PRO-ED's catalog lists no fourth edition, and the kit remains in stock.
How oral vocabulary relates to measured intelligence
Vocabulary tests correlate with verbal IQ about as strongly as any two different instruments correlate with each other, and pretending otherwise would be dishonest. On the adult Wechsler scales, the Vocabulary subtest is among the strongest single indicators of general cognitive ability in the whole battery. In Cattell-Horn-Carroll theory, the framework behind most modern cognitive batteries, word knowledge sits inside the broad comprehension-knowledge domain, which is also what psychologists mean by crystallized intelligence. McGrew, Schneider, Decker, and Bulut, applying network analysis to the Woodcock-Johnson IV standardization sample, reported results supporting the primary broad abilities described by that theory.
The practical overlap can be large. Castellino and colleagues, screening childhood brain tumor survivors before a clinical trial, found that scores on the Peabody Picture Vocabulary Test correlated 0.90 with full-scale IQ and 0.89 with verbal IQ on the Wechsler Abbreviated Scale of Intelligence. That study rested on only 12 participants who completed both measures, so the figures should be read as illustrative rather than definitive, and the authors were explicit that the vocabulary measure was not designed to replace a full neuropsychological evaluation. Our page on the Peabody Picture Vocabulary Test covers that instrument in more depth.
The honest summary is this. A high CREVT-3 score is meaningful evidence about a person's verbal ability. A low one is ambiguous on its own, because oral vocabulary depends on how much language a person has heard and read, and in which language. Two people with identical reasoning ability can post very different vocabulary scores if one grew up surrounded by books in the test language and the other did not.
What the CREVT-3 cannot tell you
The test yields no IQ score and no diagnosis. It measures one slice of oral language and says nothing directly about fluid reasoning, spatial ability, working memory, or processing speed. Identifying a language disorder or an intellectual disability requires a qualified clinician working from developmental history, observation, and a wider battery than a single vocabulary measure.
There is also a widespread practice the test should not be used for. Comparing a person's language score against an IQ score to decide whether they qualify for speech and language services is called "cognitive referencing," and the American Speech-Language-Hearing Association does not advise it as an eligibility criterion. The association notes that the relationship between language and cognition is complex and shifts over time, and that tests of cognitive and linguistic ability frequently measure the same underlying skills. A receptive-expressive gap on the CREVT-3 is a clinical observation to follow up, not a verdict about either ability.
Where a cognitive measure fits alongside it
A vocabulary test answers a narrow question well. When the question is broader, about reasoning and general cognitive functioning, a purpose-built cognitive measure is the right tool.
The Reasoning and Intelligence Online Test was developed by RIOT IQ with psychometrician Dr. Russell T. Warne for test-takers aged 18 and over. It runs 15 subtests across six cognitive indices covering verbal reasoning, fluid reasoning, spatial ability, working memory, processing speed, and reaction time, takes about 52 minutes, and reports scores on the familiar mean-100 scale with a "standard deviation", the typical spread of scores around the average, of 15 points. Like any single assessment it carries measurement error, and it does not replace an individually administered diagnostic evaluation by a qualified professional.
Frequently asked questions
Is the CREVT-3 an IQ test?
No. It is a norm-referenced oral vocabulary test. It produces a General Vocabulary Index along with subtest scores for receptive and expressive vocabulary, and no IQ or reasoning score of any kind.
What ages can take the CREVT-3?
PRO-ED norms it for ages 5 through 89, with the normative sample spanning 5-0 through 89-11 years. That range covers school-age children, adults, and later adulthood.
How long does the CREVT-3 take?
PRO-ED lists testing time as 20 to 30 minutes, administered individually by one examiner. Basal and ceiling rules on both subtests keep the session short for any given age.
What is the difference between the receptive and expressive subtests?
The Receptive Vocabulary subtest has 76 items and asks the person to point to the photograph matching a spoken word. The Expressive Vocabulary subtest has 29 items and asks the person to define a spoken word aloud. Both use the same 10 themes.
Is the CREVT-3 still the current edition?
Yes. PRO-ED's catalog lists the third edition, copyright 2013, as the current version, and it remains in stock. No fourth edition has been published.
Who is qualified to give the CREVT-3?
PRO-ED classifies it at qualification Level A, meaning no special credentials are needed to purchase it. Responsible use is a different matter, and the publisher places responsibility for administration, scoring, and interpretation on a qualified test user, typically a speech-language pathologist, educational diagnostician, or school psychologist.
References
1. Wallace, G., & Hammill, D. D. (2013). CREVT-3: Comprehensive Receptive and Expressive Vocabulary Test–Third Edition, complete kit. PRO-ED. proedinc.com
4. Buros Center for Testing. (n.d.). Comprehensive Receptive and Expressive Vocabulary Test–Third Edition [Test review]. University of Nebraska–Lincoln. marketplace.unl.edu
5. Castellino, S. M., Tooze, J. A., Flowers, L., & Parsons, S. K. (2011). The Peabody Picture Vocabulary Test as a pre-screening tool for global cognitive functioning in childhood brain tumor survivors. Journal of Neuro-Oncology, 104(2), 559–563. doi.org
6. McGrew, K. S., Schneider, W. J., Decker, S. L., & Bulut, O. (2023). A psychometric network analysis of CHC intelligence measures: Implications for research, theory, and interpretation of broad CHC scores "beyond g". Journal of Intelligence, 11(1), 19. pmc.ncbi.nlm.nih.gov
7. American Speech-Language-Hearing Association. (n.d.). Spoken language disorders [Practice portal]. asha.org
Hero image: “Dictionary indents headon.jpg” by Till Niermann, licensed CC BY-SA 3.0, via Wikimedia Commons (https://commons.wikimedia.org/wiki/File%3ADictionary_indents_headon.jpg).
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