What is the YCAT-2? The Young Children's Achievement Test explained

The YCAT-2, the Young Children's Achievement Test, Second Edition, is an individually administered test of early academic achievement for children aged 4 years 0 months through 7 years 11 months. Published by PRO-ED in 2018, it measures what a young child has already learned in general information, reading, mathematics, writing, and spoken language, and combines those five subtests into an overall Early Achievement score. A trained examiner, usually a school psychologist, educational diagnostician, speech-language pathologist, or special educator, gives it one-on-one in about 25 to 45 minutes. The YCAT-2 is not an IQ test. An IQ test estimates a child's general reasoning ability; the YCAT-2 measures learned academic skill, and evaluators often give the two together to see whether a child's early school learning is keeping pace with their ability. This article explains what the YCAT-2 covers, how it was normed, how to read its scores, and where it sits alongside intelligence testing.

PRO-ED describes the YCAT-2 as a test "designed to identify young children at risk for school failure." Its target is "academic achievement," meaning the knowledge and skills a child has picked up so far at home, in preschool, and in the early grades. The publisher notes that each of the five subtests can be administered on its own, so an examiner can give the full battery or only the areas of concern.

• General information: knowledge about the everyday world that children acquire through conversation, books, and early classroom experience.

• Reading: early literacy skills for the 4-to-7 age band, from pre-reading foundations through beginning reading.

• Mathematics: early number knowledge and quantitative skills of the kind taught in preschool and the first grades.

• Writing: early written expression and the mechanics that precede it.

• Spoken language: oral language ability, which is an achievement area in its own right and a foundation for the other four.

The five subtests combine into the Early Achievement composite. According to the publisher, all scores can be converted to standard scores, percentiles, and age equivalents. The kit includes two parallel forms, Form A and Form B, so an evaluator can retest a child after an intervention without repeating the same items. Readers comparing early childhood measures may want to look at how the YCAT-2 differs from the Bracken School Readiness Assessment, which focuses on basic concept knowledge rather than a broader spread of academic skills.

PRO-ED lists the testing time as 25 to 45 minutes, short enough for a young child's attention span, and classifies the YCAT-2 as a "Level B" instrument under its test user qualifications policy. In practice, the person responsible for administration, scoring, and interpretation needs a master's degree in psychology, education, or a closely related field with formal training in assessment, or an equivalent credential such as certification by a relevant professional body or a license in a healthcare field. PRO-ED states that its policy follows the Standards for Educational and Psychological Testing published by the American Educational Research Association, the American Psychological Association, and the National Council on Measurement in Education.

The YCAT-2 was normed on 846 children drawn from 25 states and 226 zip codes, according to PRO-ED. A "norm sample" is the reference group whose performance defines what an average score looks like at each age. A sample of 846 spread across eight age years is modest compared with the largest achievement batteries, so evaluators should check the manual for the sample size in each age band.

For "reliability," the consistency of scores, the publisher reports average coefficient alpha values from .85 to .95 for the subtests and .97 for the Early Achievement composite. Test-retest and interscorer reliability were also studied. Values above .90 are usually considered adequate for decisions about individuals; the composite clears that bar, while some subtests fall just below it, so the composite is the most dependable number the test produces.

Validity evidence, according to the publisher, comes in three forms. Content validity was built through curriculum review, item analysis, checks on test floors, ceilings, and item gradients, and analyses of differential item functioning to limit bias. Criterion validity was examined by correlating YCAT-2 scores with the Woodcock-Johnson III Tests of Achievement and the Test of Language Development: Primary, Fifth Edition, and by computing sensitivity and specificity for identifying at-risk children. Construct validity was studied through the test's relationship to age, reading, language, and intelligence, its ability to separate groups known to have below-average achievement, and the factor structure of the subtests. Anchoring to the Woodcock-Johnson, one of the most widely used achievement batteries in school psychology, is a sensible choice.

An "achievement test" measures what a person has learned, and its content is deliberately tied to curriculum: letters, words, numbers, sums, and the facts children are taught. An "IQ test" measures general reasoning ability with tasks that depend as little as possible on specific instruction. The YCAT-2 belongs squarely in the first category.

The two are strongly related. A meta-analysis by Roth and colleagues, drawing on 240 independent samples and 105,185 participants, estimated the population correlation between standardized intelligence tests and school grades at .54 after correcting for measurement error and range restriction. In a longitudinal study of more than 70,000 English children, Deary and colleagues found a correlation of .81 between a latent general intelligence factor measured at age 11 and a latent achievement factor built from national examinations at age 16. General ability is the single strongest predictor of how much a child learns.

Strong is not the same as identical, though. Achievement at ages 4 to 7 is heavily shaped by exposure: whether a child attended preschool, how much reading happens at home, and whether the family speaks the language of the test. That is exactly why an achievement test is useful. It tells the evaluator what a child can currently do, regardless of why. Dr. Russell T. Warne and Cayce Burningham found across 97 samples from 31 non-Western countries that a single general factor emerges from cognitive batteries almost everywhere, which supports the idea that IQ tests measure a broad ability rather than taught skills.

The most common setting for pairing the two is a comprehensive evaluation of a young child who is struggling in kindergarten or first grade.

For decades, United States schools identified a "specific learning disability" partly through a "severe discrepancy" between IQ and achievement scores. That approach has weakened. A meta-analysis by Stuebing and colleagues covering 46 studies found substantial overlap between poor readers with an IQ-achievement discrepancy and poor readers without one, and the authors concluded that the results "cast doubt on the need for IQ tests in identifying these students." Federal regulations under the Individuals with Disabilities Education Act now state that a state's criteria for a specific learning disability must not require a severe discrepancy between intellectual ability and achievement, and must permit a process based on the child's response to scientific, research-based intervention.

In that framework, the YCAT-2 does its most important work as a baseline and progress measure: the parallel forms support retesting after an intervention, and the subtest profile shows which areas need attention. IQ testing still contributes to a full evaluation, for example in identifying intellectual disability or giftedness, but the two tools answer separate questions and are interpreted together rather than subtracted from one another. Children who age out of the YCAT-2 range typically move to a broader battery such as the WIAT.

YCAT-2 standard scores use the familiar scale with a mean of 100 and a standard deviation of 15, so a score of 100 is exactly average for the child's age and about two thirds of children score between 85 and 115. A percentile rank gives the percentage of same-age children in the norm sample who scored at or below the child. Age equivalents, which state the age at which the child's raw score would be average, are the least precise of the three and are easy to misread. The standard score and percentile carry the real information.

Two cautions apply to any test given to a 4- to 7-year-old. Young children's scores are less stable than older children's, because attention, mood, and rapport with the examiner all affect performance, and every score carries measurement error, so a good report presents a confidence interval rather than a single point. The YCAT-2 is a screening and description tool. Any diagnosis belongs to a qualified clinician who integrates test scores with classroom observation, developmental history, and other measures.

No. The YCAT-2 measures early academic achievement in five school-related areas. An IQ test measures general reasoning ability. The two are correlated but answer different questions.

PRO-ED lists the age range as 4 years 0 months through 7 years 11 months.

The publisher lists 25 to 45 minutes for the full battery. Because the five subtests can be given independently, a partial administration takes less time.

It is a Level B test under PRO-ED's qualifications policy, so the responsible user typically needs a master's degree in psychology, education, or a related field with formal assessment training, or an equivalent professional credential or license.

It is the overall score that combines the five YCAT-2 subtests. The publisher reports an average coefficient alpha of .97 for the composite, making it the most reliable single number on the report.

No. The test is meant to capture what a child currently knows so that teachers and evaluators can plan support. A rested, fed child and a calm morning are the only helpful preparation.

The YCAT-2 records the skills a child has acquired; an intelligence test estimates the general ability that drives how quickly new skills will be acquired. Both need sound norms, published reliability and validity evidence, and a qualified interpreter.

For adults 18 and older who want a measure of general reasoning ability rather than school-based skill, the RIOT IQ test, the Reasoning and Intelligence Online Test, was developed by RIOT IQ with psychometrician Dr. Russell T. Warne. It uses 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. It does not replace an individually administered diagnostic evaluation. You can learn more or take the test at RIOT IQ.

1. Hresko, W. P., Peak, P. K., Herron, S. R., & Hicks, D. L. (2018). YCAT-2: Young Children's Achievement Test, Second Edition, complete kit [Product page]. PRO-ED. proedinc.com

2. PRO-ED. (n.d.). Qualifications policy. proedinc.com

3. Roth, B., Becker, N., Romeyke, S., Schäfer, S., Domnick, F., & Spinath, F. M. (2015). Intelligence and school grades: A meta-analysis. Intelligence, 53, 118-137. doi.org

4. Deary, I. J., Strand, S., Smith, P., & Fernandes, C. (2007). Intelligence and educational achievement. Intelligence, 35(1), 13-21. doi.org

5. Stuebing, K. K., Fletcher, J. M., LeDoux, J. M., Lyon, G. R., Shaywitz, S. E., & Shaywitz, B. A. (2002). Validity of IQ-discrepancy classifications of reading disabilities: A meta-analysis. American Educational Research Journal, 39(2), 469-518. doi.org

6. U.S. Department of Education. (n.d.). Sec. 300.307 Specific learning disabilities (34 C.F.R. § 300.307). Individuals with Disabilities Education Act. sites.ed.gov

7. Warne, R. T., & Burningham, C. (2019). Spearman's g found in 31 non-Western nations: Strong evidence that g is a universal phenomenon. Psychological Bulletin, 145(3), 237-272. doi.org

Hero photo: Wooden number blocks used for learning to count. Photo by perpetual.fostering, via Wikimedia Commons, CC BY 2.0 (cropped).