Final answer:
To show that age decreases a certain type of intelligence, focus on testing fluid intelligence, which is known to decline in late adulthood, unlike crystallized intelligence.
Step-by-step explanation:
If you wanted to demonstrate that age decreases a certain type of intelligence, you should focus on testing participants' fluid intelligence. This is the aspect of intelligence that encompasses the ability to see complex relationships and solve problems, and it is known to decline in late adulthood. In contrast, crystallized intelligence, which is characterized by acquired knowledge and the ability to retrieve it, tends to remain stable or even improve with age.
Fluid intelligence is critical for tackling complex, abstract challenges in daily life and is distinguished from crystallized intelligence, which helps you overcome concrete, straightforward problems. Psychologist Raymond Cattell's theory emphasizes the differentiation between these two components of intelligence.
When examining the impact of age on cognitive abilities, it's important to note that while some aspects of cognitive function, such as fluid intelligence, may decline, engaging in mentally and physically stimulating activities can help delay the onset of cognitive decline.