Q.How do psychologists characterise and define intelligence?
Intelligence is a key psychological construct describing how people understand the world, think rationally and adapt; its definitions have widened from "judging and reasoning well" (Binet) to "dealing effectively with the environment" (Wechsler) to also actively modifying the environment (Gardner, Sternberg).
The common-sense vs. the psychological notion
When we watch an intelligent person, we notice qualities such as mental alertness, ready wit, quickness in learning and the ability to understand relationships. The psychological notion, however, is more precise than this everyday sense. Intelligence is one of the most widely studied psychological attributes because it helps explain how individuals differ from one another and how they adapt their behaviour to the environment they live in.
Changing definitions over time
- Oxford Dictionary explains intelligence in terms of the power of perceiving, learning, understanding and knowing — attributes the early theorists also used.
- Alfred Binet, one of the first psychologists to work on intelligence, defined it as the ability to judge well, understand well, and reason well.
- David Wechsler, whose tests are the most widely used, understood intelligence in terms of its functionality, i.e. its value for adaptation. He defined it as the global and aggregate capacity of an individual to think rationally, act purposefully, and deal effectively with her/his environment.
- Gardner and Sternberg advanced the idea that an intelligent individual not only adapts to the environment but also actively modifies or shapes it.
Two broad theoretical approaches
Definitions are organised around two approaches:
- The psychometric (structural) approach treats intelligence as an aggregate of abilities and expresses performance as a single index of cognitive ability.
- The information-processing approach focuses on the processes people use in reasoning and problem-solving — on how an intelligent person acts rather than on the structure of intelligence.
Psychologists characterise intelligence as the global capacity to understand the world, think rationally and use one's resources effectively when facing challenges. Definitions range from Binet's "ability to judge, understand and reason well" to Wechsler's "global and aggregate capacity to think rationally, act purposefully and deal effectively with the environment," while Gardner and Sternberg stress that intelligence also involves shaping and modifying the environment, not merely adapting to it.
Unlock everything free for 14 days
- Full step-by-step solutions
- Concept-first explanations
- Methods, shortcuts & mistakes
- PYQ mapping + timed mock tests
Full access for 14 days. No credit card required.