What WAIS and WISC actually measure
Both the WAIS-IV (Wechsler Adult Intelligence Scale, Fourth Edition) and the WISC-V (Wechsler Intelligence Scale for Children, Fifth Edition) produce a Full-Scale IQ score alongside index scores for Verbal Comprehension, Visual-Spatial reasoning, Fluid Reasoning, Working Memory and Processing Speed. The patterns between index scores are usually more clinically informative than the headline IQ figure.
When cognitive testing is appropriate
Cognitive testing is the right step when a clear question has emerged that an IQ profile can help answer — not as a general curiosity exercise. The common questions we see are around suspected giftedness, suspected learning difficulty (especially when school performance and ability seem mismatched), NDIS eligibility evidence, and workplace or educational accommodations.
- Giftedness identification for early-school enrolment, selective programs, scholarship applications
- Differential diagnosis where ADHD, autism or learning difficulty are being considered
- NDIS access and plan-review evidence
- Workplace accommodations under Disability Discrimination Act provisions
- Twice-exceptional profiles — gifted with co-occurring learning or developmental conditions
How testing runs in practice
WAIS testing for adults usually fits into a single 2.5–3 hour session. WISC testing for children typically runs in two shorter sessions of about 90 minutes each, scheduled to avoid testing-day fatigue. After testing, we score, interpret, and write a full report — usually delivered four to six weeks later, with a feedback session to walk you through it.
What a good cognitive report looks like
A high-quality cognitive report does three things: it states scores in context (with confidence intervals and percentile rankings), it explains what the pattern means clinically, and it offers concrete recommendations that can be acted on. We avoid copy-paste recommendations and the kind of report that simply restates the scores.