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Sir Francis Galton - Big Man Theory
Seeks relationship between size of head to intelligence, doesn't find one. -
Alfred Binet (1)
Alfred Binet & Thodore Simon compose the first intelligence test (30 questions) -
Alfred Binet (2)
Refine the test and creates sub-tests for ages 3-13, increases the size of the sample (from 50 to 300) & define the concept of 'mental age' alongside a method of calculating a score on the test. -
Alferd Binet (3)
Continues to refine the test and adds more sub-tests to match adults -
Stanford-Binet v.1
Lewis M. Terman adopts and adapts Alfred Binet's test and creats the first version of the Stanford-Binet Intelligence Scale -
Stanford-Binet v.2
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Thurstone - multiple intelligences
Opposes the notion of singular General intelligence (G) and suggests to focus on Specific intelligence (S), he suggests 7 basic "Primary Mental Abilities". -
David Wechsler creates Wechsler-Bellevue
Taking in mind the criticism about Stanford-Binet's intelligence test, David Wechsler creates the Wechsler-Bellevue Intelligence Scale -
David Wechsler creates WISC
Following WAIS Wechsler creates WISC - Wechsler Intelligence Scale for Children -
David Wechsler creates the WAIS
Based on the Wechsler-Bellevue, David Wechsler creates the WAIS - Wechsler Adult Intelligence Scale -
Stanford-Binet v.3
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David Wechsler creates WPPSI
Following WAIS & WISC, Wechsler creates WPPSI - Wechsler Preschool & Primary Scale of Intelligence -
Guilford - multiple intelligence
(1967/1988), like Thurstone, Guilford opposes the notion of singular General intelligence (G). Guilford's Structure of Intellect theory suggests 180 intellectual abilities/factors based on 3 dimentions: Operation (6), Content (5) & Product (6). -
Cattell - Fluid and crystallized intelligence
1971/1979 Cattell exapnds Spearman's view of General Intelligence (G) & hypothesized about 2 discrete factors - fluid and crystallized intelligence. -
David Wechsler creates WISC-R
David Wechsler revises the WISC and creates it's next edition - WISC-R -
David Wechsler creates WAIS-R
David Wechsler revises the WAIS and creates it's next edition - WAIS-R -
Stanford-Binet v.4
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Stanford-Binet v.5
