This report is the record of the Tenth Army Human Factors Research and Development Conference held at the U. S. Army Aviation Center, Fort Rucker, Alabama, 5-8 October 1964. The continued annual sponsorship of these conferences and the publication of this report by the Chief of Research and Development, Department of the Army, reconfirms the valuable contribution of the conference to the interchange of information among agencies and personnel concerned with the effectiveness of the U. S. Army soldier and his equipment in the operational environment. A compendium of current Army human factors research and development work programs is included in the appendices of this report. The conference successfully serves the vital functions of bringing together the diverse elements of the Army's human factors research and development activities and stimulating joint efforts on common problems. This year, as in the past, the scope of the conference has been widened to include a larger number of both military and civilian agencies and institutions interested in the various facets of the human factors program.