Stuttering, or stammering, is a disruption in speech where a person repeats or prolongs words, syllables, or phrases. They may also pause during speech and make no sound at some points despite knowing ...

Stuttering is a speech disorder that can cause a person to repeat, interrupt, or prolong sounds, syllables, or words when trying to speak. About 3 million children and adults in the United States are ...

Luc F. De Nil is an associate professor and chair of the graduate department of speech-language pathology at the University of Toronto and a senior scientist at the Toronto Western Research Institute.