Psyche Cattell (August 2, 1893 – April 17, 1989) was an American psychologist who studied cognitive development in children. She was Chief Psychologist at Lancaster Guidance Clinic in Lancaster, Pennsylvania from 1939-1963. She published a book on intelligence testing and established a nursery school in her home which operated from 1941 to 1974. She is best known for the Cattell Infant Intelligence Scale, a downward extension of IQ testing used to assess children's development.