Stuttering, or stammering, is a motor speech disorder that affects the flow or rhythm of verbal communication.1, 2 An individual who stutters may repeat or prolong sounds and words in their speech. They might also have repeated physical movements, like lip tremors or eye blinking. Stuttering does not reflect an individual’s language, academic or cognitive abilities.
Stuttering affects people from all backgrounds, levels of education and personalities. Stuttering typically starts between the ages of two and four years, and can persist into adulthood.