McGrew proposed similarity between CHC theory and Carroll model reflecting a single model. Who is credited with this proposal?

• A. McGrew
• B. Vernon
• C. Piaget
• D. Spearman

Answer: (A)

The idea being tested is the idea of combining CHC theory with Carroll’s hierarchical model into one coherent framework. Neal McGrew is the scholar credited with proposing that CHC’s broad abilities and Carroll’s three-stratum structure reflect a single underlying architecture of cognitive abilities. He showed how Carroll’s strata can map onto CHC’s broad factors, making the two approaches compatible and interchangeable in practice. This bridging helps researchers and clinicians describe a person’s cognitive profile using either framework while recognizing they’re tapping the same overall structure. Vernon contributed to earlier hierarchical thinking, while Piaget and Spearman focused on different aspects of intelligence, so they aren’t the ones linked to this particular integration.