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Woodcock-Johnson IV Tests of Achievement

The Woodcock-Johnson IV Tests of Achievement (WJ IV ACH; Schrank, Mather, & McGrew, 2014) measures basic skills, fluency, and application in reading, writing, and mathematics domains.

Available from Riverside Insights


The Woodcock-Johnson IV Tests of Achievement (WJ IV ACH; Schrank, Mather, & McGrew, 2014) is an individually-administered, norm-referenced instrument that is useful for screening, diagnosing, and monitoring progress in reading, writing, and mathematics achievement areas for persons ages 2-90+ years. Basic skills, fluency, and application are measured in each of these academic domains (i.e., reading, writing, mathematics); academic knowledge in science, social studies, and humanities is also available. The Standard Battery includes 11 tests, while the Extended Battery contains 9 tests. Together, these tests can yield up to 22 cluster scores across four domains: (1) Reading/Grw (Reading, Broad Reading, Basic Reading, Reading Comprehension, Reading Fluency, Reading Rate); (2) Math/Gq (Mathematics, Broad Mathematics, Math Calculation Skills, Math Problem Solving); (3) Writing/Grw (Written Language, Broad Written Language, Basic Writing Skills, Written Expression); and (4) Cross Domain Cluster scores (Academic Skills, Academic Applications, Academic Fluency, Academic Knowledge, and Phoneme-Grapheme Knowledge). A Brief (or Broad) Achievement Score is also available. Compared with its predecessor, eight new Cluster scores are available. Three parallel forms are available, which permits progress monitoring 2-3 times per year. The WJ-IV ACH is co-normed with the WJ-IV Tests of Cognitive Ability (WJ-IV COG) and the WJ-IV Tests of Oral Language (WJ-IV OL).


Age: 2 years 0 months to 90 years+

Time to Administer: 40 mins. for 6 Standard Battery core subtests; 15-20 mins for Writing Samples test; 5-10 mins for all remaining tests

Method of Administration: Individually administered, norm-referenced academic achievement in terms of basic skills, fluency, and application.
Yields standard scores (M = 100, SD = 15), percentile ranks; relative proficiency index (RPI) scores; age and grade equivalents.
Web-based scoring.

Subscales: Overall Composite: Brief (or Broad) Achievement

Cluster Scores: 22 Cluster Scores in Reading (Grw), Mathematics (Gq), Writing (Grw), and Cross-Domain Clusters

Autism Related Research

None found. However, the WJ-III NU Technical Manual (McGrew et al., 2007) presents data regarding the performance of 155 students with autism spectrum disorder within the normative sample and suggests that, in Achievement domains, these students show low performance in Reading, Brief Math, and Writing.