Step 1: Understanding the Concept:
The question asks to identify the psychologist who defined intelligence as a "global capacity." This is one of the most famous and influential definitions of intelligence.
Step 2: Detailed Explanation:
(A) David Wechsler: Wechsler, the creator of the widely used Wechsler intelligence scales (e.g., WAIS, WISC), famously defined intelligence as "the global capacity of the individual to act purposefully, to think rationally and to deal effectively with his environment." This definition emphasizes that intelligence is a broad, multifaceted ability.
(B) Alfred Binet: Binet was a pioneer in intelligence testing, developing the concept of mental age. His focus was more on practical measures of cognitive abilities needed for academic success, rather than a broad, global definition.
(C) Howard Gardner: Gardner proposed the theory of multiple intelligences, arguing against the idea of a single "global" intelligence. He suggested that there are several distinct types of intelligence (e.g., linguistic, logical-mathematical, musical).
Step 3: Final Answer:
The definition of intelligence as a "global capacity" is attributed to David Wechsler.