Cognitive theory is a psychological theory that explains human behavior through understanding thought processes like thinking, remembering, and decision making. It emerged in reaction to behaviorism, which cognitivists believe ignores thinking. Key contributors include Allan Paivio, who proposed dual coding theory that information is processed verbally and visually; Robert Gagne, who developed cognitive learning hierarchies; Howard Gardner, who proposed multiple intelligences; and Benjamin Bloom, who created Bloom's Taxonomy. Cognitivist teaching methods aim to help students assimilate new information by explaining it in their own words and monitoring their own progress.