Why having a theory underpinning Psychometrics is important
Integration and CHC Theory
CHC Integration: In the late 1990s and early 2000s, the work of Cattell, Horn, and Carroll was integrated into what is now known as the CHC theory. This integration was spearheaded by researchers such as Kevin McGrew and colleagues, who recognised the complementary nature of the Gf-Gc and Three-Stratum models.
Comprehensive Model: CHC theory combines the broad and narrow abilities identified by Cattell and Horn with the hierarchical structure proposed by Carroll.
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