In CHC theory, which statement best describes its structure?

• A. It denies the existence of g
• B. It focuses only on practical intelligence
• C. It is identical to Thurstone's seven primary abilities
• D. It is a broad-and-narrow ability framework integrating g with multiple broad and narrow abilities

Answer: (D)

CHC theory describes a hierarchical system where a general intelligence factor, g, sits at the top, with several broad cognitive abilities beneath it and many narrower abilities under those. This broad-and-narrow structure means that cognitive performance reflects both general processing efficiency and more specific skill sets. It’s not just Thurstone’s seven primary abilities, nor is it limited to practical intelligence; it actively integrates g with multiple broad domains (like crystallized knowledge, fluid reasoning, memory, processing speed, and more) and their narrower components. For example, vocabulary tasks tap crystallized intelligence, memory tasks relate to short-term or long-term memory abilities, and rapid visual scanning taps processing speed. This integrated framework is precisely what makes the description of its structure as a broad-and-narrow ability framework, incorporating g with various broad and narrow abilities, the best fit.