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Wechsler Individual Achievement Test | Fourth Edition


Wechsler Individual Achievement Test® | Fourth Edition (WIAT-4) is an individually administered achievement test for use in a variety of clinical, education, and research settings.

Publication date:


Age range:

Individuals 4:0 - 50:11

Qualification level:


Completion time:

Varies by grade level and number of subtests administered


Paper-and-pencil, Q-interactive, and Q-global


Fall, Winter, and Spring grade-based standard scores, age-based standard scores, percentile ranks, stanines, NCEs, age and grade equivalents, and growth scale values.

Scoring options:

Q-interactive® Web-based Administration and Scoring, Q-global™ Scoring & Reporting or Manual Scoring

Report Options:

Reports include Score Summary, subtest Comparisons, Achievement/Ability Comparisons; Parent report available


Analyses of academic achievement; Supporting diagnoses of specific learning disabilities; Academic program placement; Intervention planning; Dyslexia screening/ evaluation

Pricing & Ordering

WIAT-4 will be released in Fall 2020. Pre-order opportunities will be available soon.

Sign up to receive updates as WIAT-4 prepares to launch!


Product Details

Identify what they need to achieve even more.

Wechsler Individual Achievement Test®, Fourth Edition (WIAT®-4), coming fall 2020, expands upon the flexibility of the widely used achievement test. Suitable for use in a multitude of settings and available to a wide array of professionals, the newest edition of the WIAT has some exciting updates to help you identify what support they need to achieve more.

New Subtests, More Flexible Scoring

WIAT-4 features new subtests and expanded scoring capabilities, including composites for Phonological Processing, Orthographic Processing, Writing Fluency, and an Orthographic Processing Extended Composite*

The included Dyslexia Index Scores support efficient, reliable screening.

  • New: Phonological awareness – measures speed and accuracy of phonological manipulation
  • New: Orthographic fluency - measures speed of irregular word reading
  • New: Decoding fluency - measures speed of pseudoword reading
  • New: Sentence writing fluency - measures speed of sentence composition
  • New: Orthographic Choice* - measures recognition spelling skills

*Q-interactive® only