Stuttering is explained to be a time and rhythm speech disorder. The overview in outline form on stuttering notes the nature of the disorder, primary and secondary types, incidence, age of onset, stutterer's profile, intelligence, psychological traits, physiological traits, sociological traits, predisposing conditions, precipitating conditions, perpetuating conditions, and history. Theoretical examination of the etiology of stuttering notes that traditional theories of stuttering have differed primarily in the inferences concerning the nature of the causal factor. The theories are categorized and briefly discussed in groups of physical or neurological, psychological, and physiogenic and psychogenic etiologies. Discussion of therapy notes that various and sundry methods have been used in treatment of stuttering, ranging from methods that focus upon treatment of the symptom to methods dealing with the stutterer alone. Examination of conditioning approaches to treatment points out that conditioning or learning approaches emphasize that stuttering is a speech disturbance that could happen to anyone. A variety of conditioning theories are briefly noted. (CB)