John C. DeFries

Who is John C. DeFries?

John C. DeFries is one of the world's leading behavior geneticists. His achievements include being President of the Behavior Genetics Association and cofounder of the journal Behavior Genetics, as well as its co-editor. His awards include The Dobzhansky Award for Outstanding Research in Behavior Genetics, Consulting Editor of the Journal of Learning Disabilities, Fellowships in the International Academy for Research in Learning Disabilities, Association for Psychological Science, and the American Association for the Advancement of Science, Section J.

His contributions include major twin and adoption studies of cognitive abilities, genetics of learning disabilities, and, when molecular tools became available, pioneering the use of DNA markers to locate genes that influence behavioral characters.

He established the world's first large twin study of dyslexia at the Institute for Behavior Genetics in Boulder, and supervised over 17 PhD students.

Among his works are a standard text on behavior genetics and original work on behavior-genetic methodology, some of it in collaboration with David Fulker.