New CED Development Lev/Pierce Practice Test

The contrast is described by the phrase crystallized vs fluid intelligence. This pairing names two distinct kinds of cognitive ability: crystallized intelligence (Gc) is built from knowledge and skills learned through education and experience, like vocabulary and general facts; fluid intelligence (Gf) is the capacity to reason, solve novel problems, and identify patterns without relying on prior knowledge. The two tend to show different patterns across the lifespan—crystallized grows or stays steady with age, while fluid tends to peak earlier and decline somewhat later. So, the best answer is the term that explicitly pairs both types—crystallized versus fluid intelligence. The other options point to one type or to an unrelated concept.