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William Stern (psychologist)
William Stern
(; 29 April 1871 – 27 March 1938), born
Wilhelm Louis Stern
, was a
German
psychologist
and
philosopher
noted as a pioneer in the field of the
psychology
of
personality
and
intelligence
. He was the inventor of the concept of the
intelligence quotient
, or IQ, later used by
Lewis Terman
and other researchers in the development of the first
IQ tests
, based on the work of
Alfred Binet
. He was the father of the German writer and philosopher
Günther Anders
. In 1897, Stern invented the
tone variator
, allowing him to research human perception of
sound
in an unprecedented way.
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