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. Guidance on using this test in your telepractice.

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  • Kits

    Starter & complete kits, print & digital

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    from $450.00
  • Test forms & reports

    Booklets, record forms, answer sheets, report usages & subscriptions

    7 options

    from $2.30
  • Support materials

    Manuals, stimulus books, replacement items & other materials

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    All tests & materials offered for WIAT-4

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  • WIAT-4 Complete Kit (Print) / WIAT-4 Q-global Kit (Digital) with Q-global Scoring Subscription 1 Year (Digital)
    A103000190548 Qualification Level B

    Includes WIAT-4 Print Kit [Administration Manual (Print), Scoring Manual (Print), Stimulus Book (Print), Oral Reading Fluency Booklet (Print), USB drive w/ Digital Resources (Technical Manual with Norms, Audio Files, Progress Monitoring Assistant), 25 Record Forms (Print), 25 Response Booklets (Print), and soft case]; WIAT-4 Q-global Kit [Administration Manual (Digital), Stimulus Book (Digital), Oral Reading Fluency Booklet (Digital), Technical Manual w/ Norms (Digital), Scoring Manual (Digital)]; and 1-year Q-global scoring subscription.

    In stock $800.00

  • WIAT-4 Q-global Digital Kit
    A103000190552 Qualification Level B

    Includes Administration Manual (Digital), Scoring Manual (Digital), Technical Manual w/ Norms (Digital), Stimulus Book (Digital), Oral Reading Fluency Booklet (Digital), Progress Monitoring Assistant (Digital), Error Analysis Worksheets (Digital), Graphical Profiles (Digital), Analysis & Comparisons Forms (Digital), Subtest & Composite Score Computation Forms (Digital), Dyslexia Index Manual (Digital), Response Booklet (Digital), Audio Files

    In stock $450.00

  • WIAT-4 Complete Kit (Print)
    A103000190561 Qualification Level B

    Includes Administration Manual, Scoring Manual, Stimulus Book, Oral Reading Fluency Booklet, USB drive w/ Digital Resources (Technical Manual with Norms, Audio Files, Progress Monitoring Assistant), 25 Record Forms (Print), 25 Response Booklets (Print), and soft case

    In stock $750.00

  • WIAT-4 Q-global Score Report Qty 1 (Digital)
    A103000190854 Qualification Level B

    In stock $2.30

  • WIAT-4 Q-global Scoring 1-Year Subscription
    A103000190549 Qualification Level B

    In stock $45.00

  • WIAT-4 Q-global Scoring Subscription 3 Year (Digital)
    A103000190550 Qualification Level B

    Includes unlimited scoring per user within an account

    In stock $125.00

  • WIAT-4 Q-global Scoring Subscription 5 Year (Digital)
    A103000190551 Qualification Level B

    Includes unlimited scoring per user within an account

    In stock $190.00

  • WIAT-4 Administration Manual (Print)
    A103000190563 Qualification Level B

    In stock $125.00

  • WIAT-4 Scoring Manual (Print)
    A103000190566 Qualification Level B

    In stock $25.00

  • WIAT-4 Technical and Interpretive Manual (Print)
    A103000190568 Qualification Level B

    In stock $150.00

  • WIAT-4 Oral Reading Fluency Booklet (Print)
    A103000190565 Qualification Level B

    In stock $15.00

  • WIAT-4 Record Forms Qty 25 (Print) and WIAT-4 Response Booklets Qty 25 (Print)
    A103000190562 Qualification Level B

    In stock $180.00

  • WIAT-4 Record Forms Qty 25 (Print)
    A103000190569 Qualification Level B

    In stock $110.00

  • WIAT-4 Response Booklets Qty 25 (Print)
    A103000190570 Qualification Level B

    In stock $90.00

  • WIAT-4 USB with Digital Resources
    A103000190557 Qualification Level B

    Includes Digital Technical Manual with Norms, Audio Files, Progress Monitoring Assistant

    In stock $200.00

  • WIAT-4 Stimulus Book (Print)
    A103000190564 Qualification Level B

    In stock $350.00


Publication date:

Fall 2020

Age range:

Individuals 4:0 - 50:11


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

Qualification level:


Completion time:

Varies by grade level and number of subtests administered


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

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

Guidance on using this test in your telepractice

KTEA-3: Not all dyslexia screening tools are built the same -- KTEA-3 Dyslexia Index Brief provides the trifecta - screening, guidance, and support for ages 5-25. Learn more.

Product Details

Identify what they need to achieve even more.

Wechsler Individual Achievement Test®, Fourth Edition (WIAT®-4) 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: Phonemic Proficiency – 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



Find out how to use this test in your telepractice.

Learn more



WIAT-4 on Q-interactive at a Glance:

Available With

  • Standard, Classroom, & Experiential Licenses

Subtest Pricing

  • Pay as you go: $0.88 per subtest
  • Prepay: .5 usages* per subtest

*Cost per usage between $.66 and $.88 depending on volume discounts

Scoring and Reporting

  • Score Report
  • Excel Report

Materials Needed

  • View the Pricing & Ordering tab and open the Q-interactive section

Benefits of WIAT-4 on Q-interactive

  • Enjoy automated scoring of the Essay Composition subtest!
  • Expand the Orthographic Processing composite into an extended composite, using the digital Orthographic Choice subtest!
  • Enhance your WIAT-4 results by co-administering other achievement measures, such as the KTEA-3 Rapid Automatic Naming subtest.
  • Easily build an ability-achievement battery by combining subtests from WIAT-4 with ability measures, such as the WISC-V.
  • Efficiently manage your WIAT-4 materials so you can focus on the examine

How Can I Buy WIAT-4 on Q-interactive?

New customers:

Annual Q-interactive licenses can be purchased using our online order form or by calling Customer Support at 1-800-627-7271. See the Q-interactive pricing tab for more information on license options.

Current Q-interactive customers:

If you want to add the WIAT-4 to your account, visit our online order form and select the "Add test(s) to existing account" option. You may also call Customer Support at 1-800-627-7271.



Select a question below to see the response.

Is there a way to administer the WIAT-4 remotely in two separate locations?

Digital assets are available for remote administration of the WIAT-4. WIAT-4 telepractice guidance documents are provided here.

Are there special considerations for interpreting WIAT-4 results with students who struggled to learn virtually during the pandemic?

Guidance for score interpretation following a period of educational disruption is included in the WIAT-4 Technical & Interpretive manual, and on the Pearson telepractice website under Resources.

Will there be a validity study with the WIAT-4 and WPPSI-IV?

The data collection for the WIAT-4/WPPSI-IV validity study was put on hold due to the COVID-19 pandemic. Publication of this study is TBD.

Essay Composition

How is WIAT-4 Essay Composition scored?

Option 1

The Essay Composition subtest can be scored automatically via Q-global or Q-interactive. Automated scoring is more consistent but just as reliable as hand scoring. Human scores and automated scores share a strong correlation.

Option 2

For paper and pencil customers without access to Q-global or Q-interactive, Essay Composition can be hand scored using the (correct minus incorrect word sequences) scoring rules provided in the manual.

How do I use automated scoring?

To use automated scoring, you will need internet access and a Q-global or Q-interactive account that includes WIAT-4. The following steps are followed to utilize automated scoring of Essay Composition:

  • Step 1: The examinee hand writes the essay in the Response Booklet;
  • Step 2: Within Q-global or Q-interactive, the examiner transcribes the essay by typing the essay exactly as it was written into the essay entry field;
  • Step 3: The essay is submitted and scored by Pearson's Intelligent Essay Assessor™ (IEA). Results are returned in seconds.

How do I transcribe letter reversals?

Letter reversals are not penalized in scoring, so you would type those letters in normally.

How do I transcribe illegible words?

Illegible words should be clarified following the guidelines provided in the manual.

Why do examinees hand write, instead of type, their essays?

Typing is a skill that not all examinees have acquired. Under timed conditions, examinees who type well can write more and score higher than examinees who cannot type well. In addition, many students, especially in the early grades, hand write essays in school, so this method has ecological validity.

Did the Essay Composition scoring rules change from WIAT-III to WIAT-4?

The WIAT-4 scoring rules are based on the (unchanged) Grammar & Mechanics score from the WIAT-III, which correlates strongly with overall writing quality and has high clinical sensitivity. The WIAT-III scores for Word Count and Content & Organization are not included in the WIAT-4; instead, a Content and Organization Qualitative Analysis is provided to assess these areas.

What is the Intelligent Essay Assessor (IEA)?

A patented technology based on over twenty years of research and development, IEA has been proven to score written essays as accurately as trained human scorers. IEA scores essays based on the traits included in the hand scoring rubric.

How does the IEA score an essay?

The IEA scoring engine assesses the grammar/syntax and the mechanics of the transcribed essay. When an examiner submits an essay for scoring, the IEA assesses features of the essay and compares the essay to a training set - a large database of training essays previously scored by human scorers. The IEA assigns a score based in part on the similarity of the essay to the training set.

Can the IEA score highly unusual or very brief essays?

Examiners should not attempt to score essays that are written in a language other than English, incomprehensible essays (e.g., essays with a high number of severely misspelled words), or essays that are completely off topic (i.e., the examinee did not follow the instructions). Essays must have a minimum word count of 30 to be scored; however, at least 40 words is recommended.



The following training events are available for WIAT-4.