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How is the WIAT Test Scored?

WIAT test scoring (Wechsler Individual Achievement Test®-Third Edition) is based on several derivations of status scores and growth scores.

There are as follows:

  • Status Scores
  • Standard Score
  • Percentile Rank
  • Normal Curve Equivalent
  • Stanines
  • Growth Scores
  • Grade Equivalent
  • Age Equivalent
  • Growth Scale Values

For standard scores, each number given shows the level at which your child is performing.

Very superior scores are scores over 130.

Superior scores range from 120-129.

High Average scores range from 110-119.

Average scores ranger from 90-109.

Low scores range from 80-89.

Borderline scores range from 70-79.

Extremely Low scores are scores under 69.

The administrators then use these scores to interpret performance by noting and comparing the following, noting the pattern of strengths and weaknesses:

  • Growth Scale Values
  • Grade-Based and Age-Based Scores
  • Composite Scores
  • Score Differences
  • Statistical Significance of Score Differences
  • – Frequency of Score Differences

  • – Qualitative Evaluation of Subtest Component Score Differences

    • Out-of-Level Item Set Performance
  • Wechsler Individual Achievement Test® – III (WIAT®-III) are trademarks of Pearson Education, Inc or its affiliate(s), or their licensors. TestingMom.com is not affiliated with nor related to Pearson Education, Inc. or its affiliates (“Pearson”).  Pearson does not sponsor or endorse any TestingMom.com product, nor have TestingMom.com products or services been reviewed, certified, or approved by Pearson.  Trademarks referring to specific test providers are used by TestingMom.com for nominative purposes only and such trademarks are solely the property of their respective owners.

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