Wechsler Individual Achievement Test | Fourth Edition
WIAT-4
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.- Age range:
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Individuals 4:0 - 50:11
- Qualification level:
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B
- Completion time:
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Varies by grade level and number of subtests administered
- Administration:
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Paper-and-pencil, Q-interactive, and Q-global
- Scores/Interpretation:
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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® Administration and Scoring, Q-global® Scoring & Reporting or Manual Scoring
- Report Options:
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Reports include Score Summary, subtest Comparisons, Achievement/Ability Comparisons; Parent report available
- Uses:
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Analyses of academic achievement; Supporting diagnoses of specific learning disabilities; Academic program placement; Intervention planning; Dyslexia screening/ evaluation
- Telepractice:
- Guidance on using this test in your telepractice
“...when we found his sensory triggers and used his favourite Mario song as a coping tool, everything changed.”
Renee, Psychologist
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
In each episode, you’ll meet someone who makes a profound difference in other people’s wellbeing every single day.
Tests in the WIAT-4 harness the processing capacities of Q-interactive to provide new, more dynamic, cognitively demanding tasks that are unable to be delivered and scored with fidelity in a traditional paper format.
Test Components
Required items for administering WIAT-4 on Q-interactive:
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Support |
Existing Users
If you have an active Q-interactive license, WIAT-4 will be automatically added to your account.
Select a question below to see the response.
Audio Files
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The audio files are complete; however, some multimedia applications trim slightly into a track to allow smooth transitions. We recommend using Quicktime, iTunes/Apple Music, or Windows Media Player for the cleanest, most reliable playback of the WIAT-4 audio files.
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By default, the WIAT-4 audio files are organized into folders by subtest
Within the Oral Discourse Comprehension folder:
- Files are organized in standard administration order when sorted alphabetically
- Files that may be used for more than one item will be named accordingly (e.g., Item 08_09)
Within the Phonemic Proficiency folder:
- Files are organized into subfolders, by section, to align with Phonemic Proficiency discontinuation rules
- Files for the demonstration items appear first in each section's subfolder and are followed by the remaining items for that section listed in administration order
Essay Composition
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Essay Composition can be administered at Grade 3, but this subtest is not included in the Written Expression composite until Grade 4.
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The examiner is not permitted to read the target words for the examinee. However, examinees are permitted to skip an item, if needed, as indicated in the administration instructions.
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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.
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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.
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Letter reversals are not penalized in scoring, so you would type those letters in normally.
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Illegible words should be clarified following the guidelines provided in the manual.
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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.
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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.
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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.
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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.
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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.
General
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Digital assets are available for remote administration of the WIAT-4. WIAT-4 telepractice guidance documents are provided here.
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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.
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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.
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Scores are not reported when the achievement score equals or exceeds the ability scores.
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The PSW analysis uses the reliability of the measures, which are available for both tests. However, the AAD analyses use the correlations of the measures, which are not yet available.
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The correlations between some of the WIAT-4 scores and the ability scores are too low to support the AAD predicted-difference analysis. Correlations lower than .40 are not reported to prevent prediction based on variables with a relatively weak relationship, which will lead to a strong regression toward the mean effect. To determine which correlations are available for use in the AAD predicted-difference analysis, refer to Table F.5 in the WIAT-4 Technical & Interpretive Manual.
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Yes, these data will publish with the upcoming WAIS-V. At the time of the WIAT-4 development, WAIS-V was also in development so the decision was made to complete the validity study using both new versions. The WIAT-4/WAIS-V validity study was planned for a release with both new measures at approximately the same time. However, WAIS-V data collection was paused due to the pandemic and became out of sync with the WIAT-4 release. More information about this validity study will be available as the WAIS-V development and release unfolds.
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Yes, if the initial ORF raw score yields a decimal, round up or down as appropriate. For example, 152.39= 152 and 155.59 = 156.
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No, completion times are entered in seconds, disregarding any milliseconds. For example, a completion time of 97 seconds, 50 milliseconds is entered as 97 seconds.
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