Alfred takes an IQ test at ages 25 and 55, measuring his fluid and crystallized intelligence. Based on research of their respective developmental trajectories, what are most likely changes in these two areas that we would see

It is likely that his fluid intelligence will decrease as he ages, however, his crystallized intelligence will increase as he ages.

Explanation:

Fluid intelligence refers to the ability of an individual to use his knowledge and skills to solve problems, through reasoning and cognition. This type of intelligence tends to reach a peak in an individual's youth, but it decreases as time goes by and that individual ages. Crystallized intelligence, on the other hand, is associated with cultural factors and experiences that an individual has had, thus, as time goes by and the individual has more experiences, this type of intelligence increases.

propioception;