Wechsler Adult Intelligence Scale - III

Verbal Subtests

 * Information : Degree of general information acquired from culture (e.g. Who is the premier of Victoria?)


 * Comprehension: Ability to deal with abstract social conventions, rules and expressions (e.g. What does - Kill 2 birds with 1 stone metaphorically mean?)


 * Arithmetic: Concentration while manipulating mental mathematical problems (e.g. How many 45c. stamps can you buy for a dollar?)
 * Similarities: Abstract verbal reasoning (e.g. In what way are an apple and a pear alike?)


 * Vocabulary: The degree to which one has learned, been able to comprehend and verbally express vocabulary (e.g. What is a guitar?)


 * Digit span: attention/concentration (e.g. Digits forward: 123, Digits backward 321.)


 * Letter-number sequencing: attention and working memory (e.g. Given Q1B3J2, place the numbers in numerical order and then the letters in alphabetical order)

Performance Subtests

 * Picture completion: Ability to quickly perceive visual details


 * Digit symbol - Coding: Visual-motor coordination, motor and mental speed


 * Block design: Spatial perception, visual abstract processing & problem solving


 * Matrix easoning: Nonverbal abstract problem solving, inductive reasoning, spatial reasoning


 * Picture arrangement: Logical/sequential reasoning, social insight


 * Symbol search: Visual perception, speed


 * Object assembly: Visual analysis, synthesis, and construction

Optional post-tests include Digit Symbol - Incidental Learning and Digit Symbol - Free Recall.

WAIS-III Subtests Grouped According to Indices
In addition to the Verbal and Performance IQ scores, the following four indices are derived.

Verbal comprehension

 * Vocabulary


 * Information


 * Similarities

Perceptual organization

 * Picture Completion
 * Block Design
 * Matrix Reasoning

Working memory

 * Arithmetic
 * Digit Span
 * Letter-Number Sequencing

Processing speed

 * Digit Symbol-Coding
 * Symbol Search

''Note: Picture Arrangement, Comprehension, and Object Assembly do not contribute to the Index Scores'