Joy Paul Guilford was an American psychologist best known for his work in the field of intelligence and creativity. He developed the Guilford's Structure of Intellect model, which proposed that intelligence is made up of multiple dimensions, including operations, content, and products. This model challenged traditional views of intelligence as a single, fixed trait. Guilford also emphasized the importance of creativity in education and psychology. He created various tests to measure creative potential, such as the Guilford's Alternative Uses Test. His contributions have had a lasting impact on how we understand and assess human intelligence and creativity.