Sternberg's Triarchic Theory of Intelligence measured three different kinds of intelligence. Each of these is important as they allow the individual to be successful in many different settings.
The first part of Sternberg's theory has to do with analytical intelligence. This type of intelligence describe's one's ability to use knowledge in academic settings. It is the one most measured by a standard IQ test.
The second concept concerns creative intelligence. Creative intelligence describes one's ability to apply knowledge in new ways. This applies to someone's capacity to find new ways to solve problems or to adapt to new situations.
The third concept concerns practical intelligence. This concerns one's aptitude to behave properly given the right social cues. Practical intelligence also pertains with one's ability to function in the real world and is often described as "common sense."
Sternberg claims that intelligence is not "fixed" and that it can be developed. Critics of Sternberg point out that his definitions are sometimes imprecise. Sternberg's theory challenges the notion that intelligence can be measured with a single test, yet it is not as detailed as Gardener's Theory of Multiple Intelligences.