The document discusses several theories of intelligence:
1. Thurstone's theory proposed intelligence is made up of seven primary mental abilities rather than one general factor.
2. Cattell distinguished between fluid intelligence (adaptive learning abilities) and crystallized intelligence (acquired knowledge and skills).
3. Guilford's theory identified 180 separate mental abilities composed of different types of content, operations, and products. He developed tests to measure these abilities.
4. Sternberg's triarchic theory proposed intelligence has three parts - contextual (sociocultural), experiential (insight and new ideas), and componential (information processing with performance and metacomponents).