Answer:
Spearman
Step-by-step explanation:
Two-factor theory of intelligence: In psychology, the "two-factor theory of intelligence" was proposed by one of the famous psychologist named Charles Edward Spearman, in which he mentioned that an individual's intelligence consists of two different components including specific ability which is represented by "s" and general intelligence which is represented by "g".
According to Spearman, in the given theory a single "g" factor tends to represent a person's "general intelligence" across various abilities and a second-factor "s" tends to represent a person's specific ability in a particular domain or area.
In the question above, the given statement represents psychologist "Spearman".