What approach did David Wechsler use to categorize intelligence?

David Wechsler categorized intelligence using the concept of fluid and crystallized intelligence. This framework distinguishes between two types of cognitive abilities: fluid intelligence, which refers to problem-solving and adaptability in new situations, and crystallized intelligence, which involves knowledge and skills that are acquired through experience and education. Wechsler's intelligence scales were designed to measure both aspects, providing a more comprehensive assessment of an individual's intellectual capabilities. By incorporating both fluid and crystallized intelligence into his testing, Wechsler offered a nuanced view of cognitive function, recognizing that intelligence is not a one-dimensional trait but rather a spectrum of various abilities that can be influenced by a range of factors, including culture and education. This distinction has significantly shaped how psychologists understand and evaluate intelligence in diverse populations.