text: Seven years before the study Strong wrote “I have developed a great deal of material on how to get this increased production on the part of typists on the standard keyboard. Consequently, I am not in favor of purchasing new keyboards and retraining typists on the new keyboard. ... I strongly feel that the present keyboard has not been fully exploited, and I am out to exploit it to its utmost in opposition to the change to new keyboards.” In addition, there is other evidence that Strong and Dr. Dvorak had a strained business relationship.