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William Stern

Alfred Binet

Binet-Simon Scale

David Wechsler

WAIS IQ Verbal

WAIS IQ Performance

WAIS IQ Summary

IQ Score Chart

IQ Score Visualized

The next development in the history of intelligence testing was the creation of a new measurement instrument by American psychologist David Wechsler (January 12, 1896 – May 2, 1981).It is really more complicated test and we think that it isnot suitable for a distance value. It was formed with a lot of sets and subsets.In short:

The Wechsler Intelligence Scales

WAIS test

modern IQ Test inventor - David WechslerFourteen subtests -- seven verbal (Information, Comprehension, Arithmetic, Similarities, Vocabulary, Digit Span, and Letter-Number Sequencing), and seven performance (Digit Symbol-Coding, Picture Completion, Block Design, MatrixReasoning, Picture Arrangement, Symbol Search, and Object Assembly).

In the next two chapters, we are going to define the two main sets.


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