The G Factor pdf free download. The book traces the origins of the idea of individual differences in general mental ability to 19th century researchers for inventing factor analysis in the early 20th century, which enabled statistical testing of the hypothesis that general mental ability is required in all mental efforts. Spearman, gave the name to the common factor underlying all mental tasks. He suggested that g reflected individual differences in “mental energy”, and hoped that future research would uncover the biological basis of this energy
The G Factor pdf free download
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