Judgments of stuttered and nonstuttered intervals by recognized authorities in stuttering research.

The study reported in this paper gathered judgments of stuttering on brief (5.0-sec) audiovisual speech samples taken from six adults who stuttered. Judgments were made by 10 highly experienced authorities on stuttering treatment and research, located in seven different universities or clinical research centers. Results showed considerable agreement between pairs of judges working in the same center, but large and potentially fundamental differences were identified in the amount of stuttering recorded in different centers. Approximately 40% of the 5.0-sec speech intervals used in this study were assigned the same judgment, either Stuttered or Nonstuttered, by all judges on two judgment occasions. The possibility that these intervals may serve as a core for establishing an across-center standard for behavioral judgments of stuttering is discussed.