Guilford's Structure of Intellect is a psychological theory developed by J.P. Guilford in the 1950s. It proposes that human intelligence consists of three dimensions: operations, content, and products. Operations refer to the mental processes used in thinking, such as evaluation and memory. Content involves the type of information processed, like visual or verbal data, while products represent the outcomes of these operations, such as ideas or solutions. This model categorizes intelligence into 120 distinct abilities, emphasizing that intelligence is not a single entity but a complex structure. Guilford's work has influenced educational practices and assessments, encouraging a broader understanding of cognitive abilities beyond traditional IQ tests.