• ‘Group Factor’ term was proposed to describe the ‘Group Factor’ theory.
  • Psychologist Louis L. Thurston (1887-1955) offered a differing theory of intelligence. Instead of viewing intelligence as a single, general ability, Thurston’s theory focused on nine different “primary factors”. These primary factors are independent of each other.
  • The abilities that he identified are as follows:
    • Spatial factor: It is involved in visualizing shapes.
    • Verbal factor: It is concerned with comprehension of verbal ideas.
    • Word fluency factor: It is involved whenever the subject is asked to think of isolated words at a rapid rate.
    • Numerical factor: It is the ability to do numerical calculations.
    • Memory factor: It is the ability to memorize quickly.
    • Inductive Reasoning factor: It is the ability to draw inferences.
    • Perceptual factor: It is the ability to perceive objects accurately.
    • Deductive Reasoning factor: It is the ability to make use of generalized results.
    • Problem-solving ability factor: It is the ability to solve problems independently.
  • The weakest aspect of the group factor theory was that it discarded the concept of the common factor.
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