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Wechsler Individual Achievement Test, 4th Ed.

Enter composite and subtest standard scores to generate an evidence-based narrative covering Reading, Written Expression, Mathematics, Oral Language, discrepancy analysis, and IEP-ready recommendations.

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WIAT-4 (Pearson, 2020): The most widely used academic achievement battery, frequently co-administered with the WISC-V or WAIS-5. Covers Reading (Word Reading, Pseudoword Decoding, Reading Comprehension), Written Expression (Spelling, Sentence Composition), Mathematics (Math Problem Solving, Numerical Operations), and Oral Language (Listening Comprehension, Oral Expression). All standard scores: mean = 100, SD = 15.
Student Information
Total Achievement Composite Optional
Standard Score scale: Mean = 100, SD = 15 (range typically 40–160). Enter the Total Achievement composite if it was derived. At least one domain composite or subtest score is required.
Total Composite
Total Achievement
Overall Academic Achievement
Broad composite across all academic domains: Reading, Written Expression, Mathematics, and Oral Language.
Domain Composite Scores At least one required
Enter any domain composite scores that were derived. Standard scores: mean = 100, SD = 15. At least one composite or subtest score is required to generate a report.
Reading
Reading
Reading Composite
Broad reading ability: word recognition, phonological decoding, and reading comprehension.
Writing
Written Expression
Written Expression Composite
Integrated written language: spelling accuracy and written sentence formulation.
Math
Mathematics
Mathematics Composite
Mathematical problem solving and procedural numerical operations.
Oral Language
Oral Language
Oral Language Composite
Receptive and expressive oral language: listening comprehension and oral expression.
Reading Subtests Optional — Standard Scores (40–160)
WIAT-4 subtest scores use the same standard score scale as composites (mean = 100, SD = 15). Enter any subtest scores that were administered.
Reading
Word Reading
Sight-Word & Decoding Accuracy
Reading real words aloud; measures sight-word recognition and phonics-based word reading.
Reading
Reading Comprehension
Literal & Inferential Understanding
Comprehension of written passages; literal and inferential text understanding.
Reading
Pseudoword Decoding
Phonological Decoding Skill
Decoding nonsense words; pure measure of phonics application and phonological processing.
Written Expression Subtests Optional — Standard Scores (40–160)
Writing
Spelling
Orthographic Accuracy
Writing dictated words; measures orthographic knowledge and sound-symbol correspondence.
Writing
Sentence Composition
Written Sentence Formulation
Combining and generating written sentences; syntax, word usage, and written language formulation.
Mathematics Subtests Optional — Standard Scores (40–160)
Math
Math Problem Solving
Applied Mathematical Reasoning
Word problems, graphs, and applied math tasks; mathematical reasoning and math language.
Math
Numerical Operations
Procedural Calculation Accuracy
Paper-and-pencil calculation across arithmetic, algebra, and geometry; procedural math skills.
Oral Language Subtests Optional — Standard Scores (40–160)
Oral Language
Listening Comprehension
Receptive Language Processing
Understanding orally presented passages; receptive vocabulary and inferential listening comprehension.
Oral Language
Oral Expression
Expressive Language Formulation
Expressive vocabulary, sentence repetition, and oral discourse; verbal formulation and retrieval.