Although the stall/spin accident record has improved significantly since the 1945-1948 period, the stall-related accident still accounts for a large percentage of general aviation fatalities. This study represents an effort to obtain a better understanding of the circumstances, causes, and factors which result in unintentional stalls at low altitude. A three-part program was conducted, involving extensive computer analysis of stall-related accidents for the period 1965-1973, flight evaluation of the low speed handling qualities and stall behavior of seven lightplanes, and generalized experiments to study pilot/airplane interactions in the high angle of attack regime using an in-flight simulator. The results indicate that further work is especially warranted in the areas of pilot education and training, stall warning systems, and application of new aerodynamic technology. In addition, renewed consideration should be given to the idea of limiting control power in non-acrobatic airplanes. (Author).