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The Triarchic Theory of Intelligence or Three Forms of Intelligence, formulated by psychometrician Robert Sternberg, aims to go against the psychometric approach to intelligence and take a more cognitive approach, which leaves it to the category of the cognitive-contextual theories. The three meta components are also called triarchic components.
Sternberg's definition of human intelligence is " mental activity directed toward purposive adaptation to, selection and shaping of, real-world environments relevant to one's life". Thus, Sternberg viewed intelligence as how well an individual deals with environmental changes throughout their lifespan. Sternberg's theory comprises three parts: componential, experiential and practical.