George Kelly was an American psychologist known for developing the personal construct theory of personality. Some key points about Kelly: - He was born in 1905 in Kansas and earned degrees from Park College and University of Kansas, receiving his PhD in 1931. - During World War II, he worked as an aviation psychologist and later became a professor at Ohio State University, where he developed his cognitive theory of personality. - Kelly's personal construct theory proposes that personality arises from the constructs through which people interpret events, and that these constructs can change over time based on new experiences. Individuals actively test constructs against reality.