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Francis Galton
A 19th-century scientist known for his pioneering work in eugenics, statistics, and the study of human intelligence.
Alfred Binet
A French psychologist who made significant contributions to intelligence testing and developed the first practical IQ test.
Mental Age
A measure of an individual's cognitive abilities expressed in terms of the average age at which a normal individual reaches the same level of ability.
Reasoning Skills
The ability to think, conclude, and apply logical processes to solve problems, make decisions, and understand complex concepts.
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