However, the WAIS IV remains fully valid and will continue to be used for years after the WAIS V launch due to its extensive research base.

The WAIS IV is a required instrument for diagnosing Intellectual Disability (ID) (typically FSIQ below 70-75 plus adaptive functioning deficits). Conversely, it helps identify giftedness for placement in advanced programs.

Evaluates the ability to hold and manipulate information in short-term memory. Core Subtests: Digit Span, Arithmetic.

The removal of older subtests like "Object Assembly" has reduced the examiner's ability to observe how an individual physically interacts with materials. ADHD Diagnostic Ambiguity: