The papers comprise working notes, computer punch cards, matrices and other data, correspondence, reports and publications relating to Gibb's work in Australia and the United States as a research psychologist, and his subsequent career in Australian educational administration and research. A quantity of material relating to Gibb's work on tertiary admission procedures is included. Notes and reports arising from Gibb's chairing of the 1971 committee, which reported to the Gorton Government on the condition of Aborigines on pastoral properties in the Northern Territory, are also held.