Cattell's gf-gc theory of intelligence is primarily based on which of the following foundations?

• Foundation: Cattell built his theory by analyzing numerous specific mental abilities, identifying patterns among them.
• First-order factors: Represent narrow, specific skills such as short-term memory, reaction time, or vocabulary items.
• Second-order factors: Broader abilities formed by grouping related first-order factors; this is where fluid intelligence (Gf) and crystallized intelligence (Gc) emerge.
  • Gf: Problem-solving and reasoning in novel situations, independent of prior knowledge.
  • Gc: Knowledge and skills acquired through learning and experience.
• Purpose: Second-order factors reveal meaningful clusters of abilities, providing a balance between narrow skills and general intelligence (g).
• Significance: Highlights how intelligence is structured hierarchically, rather than a single undifferentiated ability.

This clearly shows why Gf and Gc are considered second-order factors.