Which theory integrates Cattell's ideas of fluid and crystallized intelligence with Horn's and Carroll's hierarchical model?

• A. Gardner's Multiple Intelligences
• B. Sternberg's Triarchic Theory
• C. Cattell-Horn-Carroll (CHC) Theory
• D. Stanford-Binet Intelligence Scale

Answer: (C)

Merging fluid and crystallized intelligence into a single, layered view of cognitive abilities is what CHC theory accomplishes. Cattell introduced fluid intelligence (problem solving and reasoning in novel situations) and crystallized intelligence (worldly knowledge and skills). Horn expanded the framework to include additional broad abilities and a more expansive structure, while Carroll proposed a three-stratum model with general intelligence at the top, broad abilities in the middle (including Gf and Gc among them), and narrow skills at the bottom. By combining these ideas, the Cattell–Horn–Carroll framework emerges, offering a cohesive theory used to organize and interpret a wide range of cognitive abilities in tests and assessments. Other theories propose different viewpoints—Gardner's multiple intelligences suggests distinct, independent intelligences; Sternberg's triarchic theory focuses on analytical, creative, and practical intelligence; and the Stanford-Binet is a measurement tool rather than an integrative hierarchical theory.