According to Cattell, a test of verbal comprehension would draw on , whereas a test involving memory span and spatial thinking would reflect .

A test of verbal comprehension would draw on crystalized intelligence, whereas a test involving memory span and spatial thinking would reflect fluid intelligence.

Explanation:

Raymond Cattell suggested the terms crystalized and fluid intelligence, in which he proposes that intelligence has various abilities that interact with one another to form a general individual intelligence.

Let's define both:

By these terms, we can conclude that verbal comprehension would require the use of crystalized intelligence, whereas a test about memory span and spatial thinking (abstract thoughts), would require the use of fluid intelligence.