This volume contains five papers presented at a conference on developmental and environmental factors related to the onset of stuttering, evaluation and treatment procedures, and the measurement of therapy outcomes. In "The Development of Fluency in Normal Children," C. W. Starkweather considers evaluation of the fluency of young speakers. L. A. Nelson, "Language Formulation Related to Disfluency and Stuttering," focuses on the relationships between language developmental factors, disfluency, and language problems of children. In the paper "Speech Motor Processes and Stuttering in Children: A Theoretical and Clinical Perspective," J. M. Hanley sees the child as a communicating, interacting individual who possesses those motoric disruptions labelled as stuttering. "Emotional and Environmental Problems in Stuttering," by D. E. Williams identifies the increasing trend toward investigation of factors within and outside of the child which contribute to increased disfluency. In "Toward a Therapy Assessment Procedure for Treating Stuttering Children," R. J. Ingham considers ways to evaluate the effectiveness of stuttering and speech therapy programs. A sixth paper, "Integration: Present Status and Prospects for the Future" by H. H. Gregory, offers an integration of the main points made in the individual papers and the resultant discussion groups. (CB)