What is the TEWL-3? The Test of Early Written Language explained

The TEWL-3, or Test of Early Written Language, Third Edition, is an individually administered, norm-referenced test of writing ability for children aged 4 years 0 months through 11 years 11 months, published by PRO-ED in 2012. It is given one-on-one by a qualified examiner, usually a school psychologist or speech-language pathologist, and takes about 30 to 50 minutes. The TEWL-3 is not an IQ test. It measures a taught academic skill, early writing, rather than general reasoning ability, and it is usually given alongside a cognitive measure when a school team wants to know whether a child's written work lags behind what would be expected. This article explains what the test contains, how it is scored, and how it fits next to IQ testing.

According to PRO-ED, the TEWL-3 is a revision of the Test of Early Written Language, Second Edition, and it comes in two equivalent forms, Form A and Form B. Each form contains two subtests, Basic Writing and Contextual Writing, which together produce an Overall Writing index.

The test's authors are Wayne Hresko, Shelley Herron, Pamela Peak, and Deanna Hicks. PRO-ED and Pearson, which also distributes the kit in the United States, both list the TEWL-3 at qualification level B. PRO-ED requires purchasers of level B and C assessments to document the credentials of the qualified user before ordering, so the test is not available to parents or general educators.

Schools most often use the TEWL-3 during evaluations for a possible learning disability in written expression. The publisher positions the test as a companion to the TOWL-4, the Test of Written Language, Fourth Edition, and says the TEWL-3 "extends the assessment range to younger children." Our article on the TOWL-4 covers the older-student version, which PRO-ED norms for ages 9-0 through 17-11.

• Basic Writing: This subtest has 70 items, each scored 0, 1, or 2, arranged in order of increasing difficulty. The skills sampled include "metalinguistic knowledge" (the ability to think about language itself), directionality, organizational structure, awareness of letter features, spelling, capitalization, punctuation, proofing, sentence combining, and writing logical sentences. Age-based norms cover 4-0 through 11-11, and grade-based norms cover grades 2 through 6.

• Contextual Writing: This subtest has 20 items scored from 0 to 3. The child is shown a picture prompt and asked to construct a story. Two picture sets are supplied, one for ages 5-0 through 6-11 and one for ages 7-0 through 11-11. The subtest is scored for story format, cohesion, thematic maturity, ideation, and story structure, and PRO-ED provides an expanded scoring guide because open-ended writing is harder to score consistently than a right-or-wrong item. Age-based norms cover 5-0 through 11-11, and grade-based norms cover grades 2 through 6.

• Overall Writing: The Overall Writing index combines the index scores from the two subtests. It can only be computed when the child completes both subtests and is at least 5 years old.

Either subtest can be administered on its own; only the Overall Writing index requires both.

The TEWL-3 reports its subtest and composite results as standard score indexes with a mean of 100 and a "standard deviation" (a measure of how spread out scores are) of 15. It also provides age and grade percentiles and equivalents. A score of 85 sits one standard deviation below the mean, at roughly the 16th percentile; a score of 115 sits one standard deviation above, near the 84th percentile. Grade equivalents describe the grade at which a raw score is typical, not the grade at which the child should be taught.

According to PRO-ED, the TEWL-3 norms are based on more than 2,085 children from 30 states and British Columbia, Canada. The publisher reports that the sample's characteristics correspond to 2010 census data on geographic region, gender, ethnicity, Hispanic status, household income, parental educational attainment, and exceptionality status, with data matched to census projections for 2010 and 2015. The publisher also reports differential item functioning analyses that it says suggest no biased items. Because the norms date from around 2010, a "norm-referenced" score on the TEWL-3 compares a child to that specific reference group at that time, a routine caveat for any test that has been on the market for more than a decade.

PRO-ED reports three kinds of reliability for the TEWL-3. "Internal consistency" (whether the items within a subtest hang together) is reported as coefficient alpha, and the publisher states that alpha values for all scores meet or exceed .90 at every age and grade, with most at or above .95. For "alternate-form reliability" (whether Form A and Form B give the same result), the publisher reports that 38 of 42 coefficients meet or exceed .90 and the remaining four fall in the mid-to-high .80s. "Stability" (test-retest agreement) is described as approximating or exceeding .90 for all scores.

For validity, the publisher reports correlations and mean comparisons with the Woodcock-Johnson III, the Wechsler Individual Achievement Test, Second Edition, and the 6+1 Writing Trait Rubric. Used to predict low scores on the Woodcock-Johnson III and the WIAT-II, the TEWL-3 produced sensitivity indexes of .86 and .91, specificity indexes of .89 and .88, and an area under the ROC curve of .96 for both. Classification accuracy was .88 for both criterion tests. "Sensitivity" here means the proportion of children who scored low on the criterion test and were also flagged by the TEWL-3, while "specificity" is the proportion who scored adequately and were correctly not flagged. Our explainer on the WIAT test describes how that battery covers reading, writing, and mathematics across a much wider age range.

These are publisher-reported figures. The TEWL-3 was reviewed independently in the Twentieth Mental Measurements Yearbook from the Buros Center for Testing, and readers who need a critical appraisal rather than a catalog description should consult that review.

Writing is a skill children are taught. General intelligence is a broad reasoning ability that helps children learn skills of every kind. That distinction is why the TEWL-3 and an IQ test are usually given together. The IQ test estimates how readily a child can learn, and the achievement test measures what has actually been learned so far.

Under federal special-education regulations, a school team may identify a specific learning disability when a child does not achieve adequately in one of eight areas, including written expression. The same regulation allows the team to consider a pattern of strengths and weaknesses relative to age, grade-level standards, or "intellectual development," and it requires the team to rule out an intellectual disability as the primary cause of the low achievement. A test like the TEWL-3 supplies the achievement side of that comparison, and an individually administered cognitive test supplies the intellectual-development side. Neither test alone identifies a disability; that determination belongs to the evaluation team and the qualified clinicians on it.

Research supports assessing writing early. Puranik and Lonigan studied 372 preschoolers and found that children as young as three already possess knowledge about writing and that literacy skills show substantial continuity from preschool into the early elementary grades. For the reading counterpart, PRO-ED publishes the TERA-4, the Test of Early Reading Ability, Fourth Edition, which many evaluators pair with the TEWL-3.

Dr. Russell Warne's book In the Know argues that IQ tests measure general cognitive ability rather than specific taught content, which is what allows an IQ score to predict achievement across many subjects. A child with a high IQ score and a low TEWL-3 score presents a different picture from a child with low scores on both.

• It is a writing test only: The TEWL-3 says nothing about reading, mathematics, or spoken language, and it cannot support conclusions about a child's intelligence.

• The norms are more than a decade old: The reference group reflects the 2010 census, a point examiners weigh when interpreting scores.

• Contextual Writing scoring is judgment-based: Rating a child's story for cohesion and thematic maturity requires training and a careful reading of the scoring guide, and consistency depends on the examiner.

• Four-year-olds get a partial profile: Because Contextual Writing begins at age 5, the youngest children receive only the Basic Writing index and no Overall Writing score.

• A single score has error around it: The Standards for Educational and Psychological Testing expect examiners to interpret scores with attention to measurement error. A TEWL-3 index of 88 and one of 92 may not reflect any real difference.

No. As of September 2026, PRO-ED's catalog lists the Test of Early Written Language, Third Edition (copyright 2012) as the current edition, and searches for a fourth edition return only the related TOWL-4 and TELD-4. The TEWL-3 remains the edition in use.

Children aged 4 years 0 months through 11 years 11 months. Basic Writing starts at age 4; Contextual Writing and the Overall Writing index begin at age 5.

PRO-ED lists the testing time as 30 to 50 minutes, administered individually.

No. It is a norm-referenced achievement test of early writing, while IQ tests measure general reasoning ability. The two are often given together so an evaluation team can compare a child's writing with the level expected from their ability.

PRO-ED sells the TEWL-3 at qualification level B and requires purchasers to document the credentials of the qualified user. In schools that usually means a school psychologist, educational diagnostician, or speech-language pathologist trained in standardized assessment.

It reports index scores for Basic Writing, Contextual Writing, and Overall Writing on a mean-100, standard-deviation-15 scale, plus age and grade percentiles and age and grade equivalents.

The TEWL-3 answers a narrow question about a young child's writing. The RIOT IQ test, the Reasoning and Intelligence Online Test, was developed by RIOT IQ with psychometrician Dr. Russell T. Warne for adults 18 and older. It contains 15 subtests across six cognitive indices (verbal reasoning, fluid reasoning, spatial ability, working memory, processing speed, and reaction time), takes about 52 minutes, and reports scores on the same mean-100, standard-deviation-15 scale used by the TEWL-3. It does not replace an individually administered diagnostic evaluation. If you would like a normed measure of your own reasoning ability, you can take the RIOT IQ test at riotiq.com.

1. PRO-ED. (2012). TEWL-3: Test of Early Written Language–Third Edition, Complete Kit [Product page]. proedinc.com

2. PRO-ED. (2009). TOWL-4: Test of Written Language–Fourth Edition, Complete Kit [Product page]. proedinc.com

3. Pearson. (n.d.). Test of Early Written Language, Third Edition (TEWL-3) [Product page]. pearsonassessments.com

4. Buros Center for Testing. (n.d.). Test of Early Written Language–Third Edition [Test review listing, The Twentieth Mental Measurements Yearbook]. marketplace.unl.edu

5. U.S. Department of Education. (2026). 34 CFR 300.309: Determining the existence of a specific learning disability. Electronic Code of Federal Regulations. ecfr.gov

6. Puranik, C. S., & Lonigan, C. J. (2011). From scribbles to scrabble: Preschool children's developing knowledge of written language. Reading and Writing, 24(5), 567–589. pmc.ncbi.nlm.nih.gov

7. Warne, R. T. (2020). In the know: Debunking 35 myths about human intelligence. Cambridge University Press. doi.org

8. American Educational Research Association, American Psychological Association, & National Council on Measurement in Education. (2014). Standards for educational and psychological testing. testingstandards.net

Hero photo: A hand writing with a pen on grid paper. Photo by Mummelgrummel, via Wikimedia Commons, CC BY-SA 3.0 (cropped).