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Reading a WISC-V Report — Why the Profile Matters More Than the IQ Score

By Leon MoriguchiPublished May 15, 2026Updated May 18, 20266 min read日本語版あり
Audience
Parents whose child has taken, or been recommended for, a WISC-V assessment

TL;DR

  • ·The WISC-V Full-Scale IQ is an average of five substantially different cognitive abilities; a child with a 45-point gap between their strongest and weakest index may end up with a composite score that accurately describes neither end of their actual profile
  • ·Low Processing Speed (PSI) and Working Memory (WMI) are the indexes most commonly depressed in children with ADHD and learning disabilities — these translate directly into "can't keep up with copying from the board" and "can't follow multi-step spoken instructions," which are accommodation-specific findings
  • ·Sharing the full report with the school — not just the FSIQ — and translating index scores into concrete accommodation requests is how assessment results become support plans rather than filed paperwork

Contents

  1. Lead
  2. Background: What the Test Is and Isn't
  3. The Problem with Over-Relying on the Full-Scale IQ
  4. What the Five Indexes Measure
  5. How to Use the Results at School
  6. Practical Takeaways
  7. Summary
  8. Related Articles
  9. References

Lead

"The results are back. The IQ is [number]." A parent hears that sentence and walks away not knowing what to do with it. If the number is high, there is relief. If it is low, there is worry. Both reactions may be missing what the assessment actually measured.

The WISC-V: Wechsler Intelligence Scale for Children, Fifth Edition; an individually administered cognitive assessment for ages 6–16 measuring five distinct ability domains (Wechsler Intelligence Scale for Children — Fifth Edition) is not a test that produces a single number. It is a tool for drawing a map of cognitive strengths and weaknesses — a profile. Knowing how to read that map is what makes the results useful for school support plans and for how you engage with your child at home.

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