CHC theory

The CHC theory, discussed by François Chollet, refers to a hierarchical model of cognitive abilities developed by psychologists Carroll, Horn, and Cattell. This model outlines three levels of cognitive skills:

1. G Factor (General Intelligence): At the top of the hierarchy, representing overall cognitive ability.
2. Broad Cognitive Abilities: This includes abilities like fluid intelligence, which encompasses a wide range of cognitive tasks.
3. Narrow Cognitive Abilities: These are more specialized skills associated with specific tasks.

CHC theory emerged from factor analysis of IQ tests and suggests that while a common factor (G) can indicate general intelligence, it doesn't imply that individuals with high G can solve all types of problems. The theory is compared to the concept of physical fitness to highlight its limitations: just as being fit does not enable one to fly, having a high G does not equip an individual to tackle every conceivable challenge 1.