WIAT-4 and KTEA-3 Scores Explained for Parents

Two Tests, Same Problem — the Report Makes No Sense

Whether your child was tested with the WIAT-4 (Wechsler Individual Achievement Test, Fourth Edition) or the KTEA-3 (Kaufman Test of Educational Achievement, Third Edition), the report probably landed in your inbox as a wall of tables with numbers that don't obviously connect to what's happening in the classroom. Both tests use the same scoring framework — mean of 100, standard deviation of 15 — but they organize subtests differently and each has features the other lacks.

WIAT-4 Score Structure

The WIAT-4 groups scores into composites and subtests. The composites most parents see first:

• Reading Composite: Combines Word Reading and Reading Comprehension. This is the broadest reading number and the one schools cite most often.
• Basic Reading Composite: Adds Pseudoword Decoding and Phonemic Proficiency alongside Word Reading. This gets closer to foundational decoding ability.
• Mathematics Composite: Combines Math Problem Solving and Numerical Operations.
• Written Expression Composite: Includes Alphabet Writing Fluency for younger children, Spelling, Sentence Composition, and Essay Composition.

The WIAT-4 also generates a Dyslexia Index from Word Reading, Pseudoword Decoding, and Orthographic Fluency. If your child's evaluator reported this index, pay attention — it's one of the few built-in screening tools that flags reading disability risk directly from the test data.

KTEA-3 Score Structure

The KTEA-3 uses a slightly different architecture. Its Academic Skills Battery (ASB) Composite is the broadest summary — combining reading, math, and written language cores into one number. Beyond that:

• Reading Composite: Letter & Word Recognition, Reading Comprehension.
• Math Composite: Math Concepts & Applications, Math Computation.
• Written Language Composite: Written Expression, Spelling.
• Sound-Symbol Composite: Measures the connection between what a child hears and what they read — useful for flagging phonological processing issues.
• Dyslexia Index: Like the WIAT-4 version, this generates a risk classification from "Very Low Risk" to "Very High Risk." The subtests feeding it change by grade level — phonological tasks for K-1, decoding fluency measures for grades 2-12.

What the KTEA-3 Has That Others Don't

The KTEA-3's standout feature is its built-in Error Analysis system. Instead of just counting right and wrong answers, it categorizes the types of errors your child makes and compares them against national norms. Did your child drop consonant blends? Misread short vowels? Make regrouping errors in subtraction?

This matters because two children can get the same standard score for completely different reasons. One might struggle with phonemic awareness; the other might have strong phonics but fall apart on multisyllabic words. The error analysis tells you which specific skills need intervention — information that a standard score alone never provides.

Reading the Subtest Splits

On both tests, the critical information lives in the gap between subtests within the same composite.

WIAT-4 example: Word Reading at 95 but Pseudoword Decoding at 72. The child recognizes memorized words but can't decode unfamiliar ones. The Reading Composite might average these into the low 80s — technically "Low Average" — but the 23-point subtest gap tells a story the composite obscures.

KTEA-3 example: Letter & Word Recognition at 88 but Reading Comprehension at 104. The child understands what they read once they manage to decode it, but the decoding itself is labored. The Reading Composite might land around 96 — solidly "Average" — masking the decoding weakness entirely.

Timed vs. Untimed Scores

Both tests include timed subtests (fluency measures) and untimed subtests. A child with processing speed issues might score Average on untimed word reading but drop 20-30 points on fluency measures. That gap has direct classroom implications — homework takes three times as long, timed tests are disasters, and reading stamina is poor even though accuracy is fine.

Ask the evaluator whether any timed and untimed subtests showed a significant discrepancy. If they did, that's evidence for accommodations like extended time.

What to Ask at the Meeting

When the evaluator presents WIAT-4 or KTEA-3 results, three questions cut through the noise:

1. Which subtests pulled the composite score up or down? A composite in the Average range means nothing if one subtest is 110 and another is 75.
2. For KTEA-3 — what did the error analysis show? If the evaluator doesn't mention it, ask specifically. It's one of the most useful features of this test and it often doesn't make it into the summary paragraph.
3. Were fluency subtests administered, and how did they compare to accuracy subtests? The timed/untimed split is the most common place where real struggles hide behind decent-looking scores.

The Achievement Test Decoder includes a complete subtest-by-subtest breakdown for both the WIAT-4 and KTEA-3, along with a composite masking detector that flags when broad scores are averaging away a real problem.