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Alfred Binet and Theodore Simon are credited with creating the first standardized IQ test, known as the Binet-Simon scale, in the early 20th century. Their primary focus was to identify children who may need additional academic support, thus allowing for early intervention and tailored educational assistance. The test measured a variety of cognitive abilities and set the foundation for future intelligence testing.

Their work established a systematic method of quantifying intellectual capacity through standardized administration and scoring, which would later evolve into modern IQ tests. This development was significant in psychology and education, as it provided a framework for assessing intellectual performance and understanding individual differences in cognitive abilities.

In contrast, while figures like Sigmund Freud and Carl Jung contributed immensely to psychological theories, they did not create standardized IQ tests. Rudolph Dreikurs was known for his work in education and psychology but was not involved in the development of IQ testing. Thus, Binet and Simon’s contribution laid essential groundwork for the field of psychometrics and continues to influence assessments of intelligence today.