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Hierarchisches Modell von Cattell-Horn-Carroll

3 hierarchische Ebenen (Stratum):
- Stratum III: 1 general ability (g-Faktor)
- Stratum II: 10 broad abilities
- Stratum I: über 70 narrow abilities

Die "broad abilities" lauten: (G steht für "general")

1. Crystallized Intelligence (Gc)
includes the breadth and depth of a person's acquired knowledge, the ability to communicate one's knowledge, and the ability to reason using previously learned experiences or procedures.
2. Fluid Intelligence (Gf)
includes the broad ability to reason, form concepts, and solve problems using unfamiliar information or novel procedures.
3. Quantitative Reasoning (Gq)
is the ability to comprehend quantitative concepts and relationships and to manipulate numerical symbols.
4. Reading & Writing Ability (Grw)
includes basic reading and writing skills.
5. Short‐Term Memory (Gsm)
is the ability to apprehend and hold information in immediate awareness and then use it within a few seconds.
6. Long‐Term Storage and Retrieval (Glr)
is the ability to store information and fluently retrieve it later in the process of thinking.
7. Visual Processing (Gv)
is the ability to perceive, analyze, synthesize, and think with visual patterns, including the ability to store and recall visual representations.
8. Auditory Processing (Ga)
is the ability to analyze, synthesize, and discriminate auditory stimuli, including the ability to process and discriminate speech sounds that may be presented under distorted conditions.
9. Processing Speed (Gs)
is the ability to perform automatic cognitive tasks, particularly when measured under pressure to maintain focused attention.
10. Decision/Reaction Time/Speed (Gt)
reflect the immediacy with which an individual can react to stimuli or a task (typically measured in seconds or fractions of seconds; not to be confused with Gs, which typically is measured in intervals of 2‐3 minutes).