1 Introduction.- "Theories" and "Definitions".- A Clear and Certain Focus.- A Suspicion of Language Disorder.- 2 The Study of Nonfluency.- Fluency-The Essential Reference.- Investigation of Nonfluency: Origins and Directions.- Nonfluency Findings from the Stuttering-Based Research.- Nonfluency in Normal Speech.- Comparison and Integration of the Two Lines of Research.- Amounts of Disfluencies: Comparative Data.- The Nonfluent Character of Ordinary Speech.- Awareness of Nonfluencies.- Commentary.- II Language Factors: Accumulated Research and a New Analysis.- 3 Language Factors: Early Findings.- The Object of Study.- The Brown Series.- Commentary.- 4 Corroboration, Extension, Complication.- Early Contributions.- Hiatus and Revival.- The Later Research.- Summary and Discussion.- 5 Normal Language: The Necessary Reference.- Structural Features of Ordinary Oral Language.- Language Structures and Stutter Events.- Distillation.- 6 The Fault Line.- Focus on the Syllable.- III Enlarging The Scope: A Comparative Study of Language Dimensions in Stuttering.- 7 Method and Procedure.- Subjects.- Measures Used and Rationale.- Procedure.- 8 Results and Discussion.- Linguistic Dimensions.- Disfluency Dimensions.- IV A New Departure.- 9 Outlines of a Language Dysfunction.- Word-Initial Position.- More on Word-Fluency.- Linguistic Stress.- Propositionality.- The Laterality Connection.- Consonant and Vowel Again.- Synopsis.- References.- Author Index.