Is Speed of Stimulus Categorization Slower in Stuttering Speakers? A Cognitive Event-Related Potential Study

This study examined stimuli classification skills in stuttering and nonstuttering speakers using a group study design across two measurement times. Auditory P300 event-related potentials were assessed in 10 stuttering speakers and 12 nonstuttering speakers. Study participants were recorded twice: stuttering speakers before and after a 3-week stuttering modification treatment program and controls three weeks apart. Right and left hemispheric P300 responses to tonal and speechlike stimuli were measured