A qualified psychologist interprets the WAIS-IV by looking beyond the FSIQ. For instance, a person might score in the 130s (Gifted) for Verbal Comprehension but in the 80s (Low Average) for Processing Speed. This "scatter" points to specific cognitive profiles, such as twice-exceptionality (2e).
: Identifying cognitive decline, tracking traumatic brain injury (TBI) recovery, or diagnosing neurodegenerative conditions like Alzheimer's disease.
The is a standardized clinical instrument used by psychologists to measure the cognitive ability of individuals aged 16 to 90. It is widely considered the "gold standard" for measuring adult intelligence. Core Structure of the WAIS-IV
WAIS‑IV yields:
Solving visual balance-scale equations to measure quantitative fluid reasoning.
Questions start easy and get progressively harder until you reach a "ceiling," where you can no longer answer correctly.
This measures the ability to quickly and accurately scan, sequence, and discriminate simple visual information. It reflects neurocognitive efficiency.
The WAIS-IV remains the reference standard for adult cognitive assessment. It is highly reliable, clinically insightful, and well-normed. However, it is lengthy, expensive, and requires expert interpretation. For most licensed psychologists and neuropsychologists, it is an indispensable tool, but it is not appropriate for self-testing or quick screening.
The WAIS-IV abandons the older Verbal/Performance IQ split in favor of a more nuanced four-index structure. It consists of 10 core subtests and 5 supplemental subtests.