Which of the following is true regarding fluid and crystallized intelligence? Measuring fluid intelligence in infancy is the best predictor of later IQ scores. test items measuring crystalized and fluid intelligence do not correlate with each other Crystallized intelligence shows little decline as a result of aging. Fluid intelligence improves over time and does not depend on processing power.

The statement that is true regarding fluid and crystallized intelligence is:

**Crystallized intelligence shows little decline as a result of aging.**

Crystallized intelligence refers to the knowledge and skills acquired through experience and education, such as vocabulary and general knowledge. It tends to remain stable or even improve with age because it relies on accumulated knowledge.

Fluid intelligence, on the other hand, involves the ability to reason, solve novel problems, and think abstractly. It typically declines with age as it depends more on processing speed and cognitive flexibility, which can diminish over time.

The other statements are incorrect:
- Measuring fluid intelligence in infancy is not the best predictor of later IQ scores; early measures of intelligence can be unstable.
- Test items measuring crystallized and fluid intelligence often do correlate with each other, as both contribute to overall cognitive functioning.
- Fluid intelligence does not improve over time; it generally peaks in young adulthood and may decline with age.