WISC-IV (2003)
(2-3-15)

David Wechsler's view of intelligence

"The global capacity of a person to act purposefully, to think rationally, and to deal effectively with his/her environment." (1939, p. 229)

Full Scale IQ

Verbal IQ

Performance IQ

Wechsler intelligence tests

adult intelligence tests

W-B Wechsler-Bellview 1939

WAIS Wechsler Adult Intelligence Scale 1955

WAIS-R Wechsler Adult Intelligence Scale-Revised 1981

WAIS-III Wechsler Adult Intelligence Scale, Third Edition 1997

WAIS-IV Wechsler Adult Intelligence Scale, Fourth Edition (2008)

children's intelligence tests

WISC Wechsler Intelligence Scale for Children 1949

WISC-R Wechsler Intelligence Scale for Children-Revised 1974

WISC-III Wechsler Intelligence Scale for Children, Third Edition 1991

WISC-IV Wechsler Intelligence Scale for Children, Fourth Edition 2003

preschool children's intelligence tests

WPPSI Wechsler Primary and Preschool Scale of Intelligence (1967)

WPPSI-R Wechsler Primary and Preschool Scale of Intelligence-Revised (1989)

WPPSI-III Wechsler Primary and Preschool Scale of Intelligence, Third Edition (2002)

WISC-IV conceptual model:

Verbal Conceptual Index

Similarities
Vocabulary
Comprehension
(Information)
(Word Reasoning)

Perceptual Reasoning Index

Block Design
Picture Concepts
Matrix Reasoning
(Picture Completion)

Working Memory Index

Digit Span
Letter-Number Sequencing
(Arithmetic)

Processing Speed Index

Coding
Symbol Search
(Cancellation)

Each subtest yield a standard score (mean = 10, s.d. = 3) based on age norms

An Index Score (mean = 100, s.d. = 15) is generated for each of the four factor areas

A FULL SCALE IQ (FSIQ) is generated based on 10 subtests (3 VCI, 3PRI, 2 WMI, 2 PSI)

Standard Score (mean = 100, s.d. = 15)

The is a change from the traditional Wechsler model of intelligence: VIQ (Verbal IQ), PIQ (Performance IQ), and composite FSIQ

WISC-V conceptual model: new factor model

Verbal Conmprehension Index

Similarities
Vocabulary

Visual Spatial Index

Block Design
Visual Puzzles

Fluid Reasoning Index

Matrix Reasoning

Figure Weights

Working Memory Index

Digit Span

Picture Span

Processing Speed Index

Coding

Symbol Search

Each subtest yield a standard score (mean = 10, s.d. = 3) based on age norms

An Index Score (mean = 100, s.d. = 15) is generated for each of the four factor areas

A FULL SCALE IQ (FSIQ) is generated based on 10 subtests (2 VCI, 2 VS, 2 FR, 2 WM, 2 PS)

Standard Score (mean = 100, s.d. = 15)