Unlike people with stuttering, those with IAS find it easier to speak, as well as slower and more understandable, when people try to control their disorder.
The person seems incapable of putting his thoughts into continuous sentences and connecting them in a logical way. Concomitant problems with people with IAS include daydreaming, hyperactivity, learning disabilities, joint problems and acoustic processing.
IAS ss often accompanied by stuttering. Reason is usually disorganized and the person is usually unaware of their difficulty. The study of the neurophysiological basis of the disorder shows abnormalities in the basal ganglia.