Cattell-Horn-Carroll (CHC) Definition Project

Based on Carroll's (1993) treatise on the factor structure of human cognitive abilities, McGrew (1997) abstracted brief definitions of the narrow and broad CHC abilities. These definitions have now been revised, expanded, and clarified in the table below. The revised "working" definitions are based on a review of ability definitions from a variety of sources, including Carroll (1993), the original ETS Factor Reference Work group publications (Ekstrom et al., 1979), the Encyclopedia of Human Intelligence (Sternberg, 1994), the Dictionary of Psychology (Corsini, 1999), and recent published research.