In commenting on intelligence during middle age,all are appropriate descriptions EXCEPT:

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Declining in every skill is not an appropriate description of intelligence during middle age. Most research suggests that while fluid intelligence, which involves abstract reasoning and problem solving, may decline, crystallized intelligence, which involves knowledge and skills gained through experience, can continue to improve or remain stable during middle age. Additionally, some studies suggest that overall intellectual functioning may reach a peak during middle age before gradually declining later in life.

In Commenting on Intelligence During Middle Age,all Are Appropriate Descriptions