ABSTRACT
The present article is intended purely as a survey. But in this case, survey and comparison of published data serve the purpose of posing a problem in a considerably more general way than has been true in the past. Our goal is to determine analogies among what would appear to be completely different collections of phenomena studied and described by specialists in very diverse disciplines. For the fact is that observations and findings on the phenomena of echolalia as the most elementary form of response may be found in the works of physiologists studying verbal reactions in adults and children; of teachers and psychologists studying the development of children's speech; and of neuropathologists, neuropsychologists, and psychiatrists who have studied the symptoms of echolalia in organic or functional speech pathology.
