Echolalia is the immediate and involuntary repetition of either ambient sounds or of vocalizations made by another person. It is closely related to echopraxia, the automatic repetition of movements made by another person.
The word "echolalia" is derived from the Greek ἠχώ, meaning "echo" or "to repeat", and λαλιά (laliá) meaning "speech" or "talk" (of onomatopoeic origin, from the verb λαλέω (laléo), meaning "to talk").
Echolalia occurs during human child development, with babies producing vowels, some consonants and echolalia between 6 to 9 months of age. It can also describe a speech disorder in humans with developmental disabilities.
Associated conditions 
Echolalia can be present in autism and other developmental disabilities, Tourette syndrome, aphasia, Rubinstein-Taybi syndrome, schizophrenia, Asperger syndrome, Alzheimer's disease, and, occasionally, other forms of psychopathology including catatonic subtype in schizophrenia. It is also frequently found in blind or visually impaired children, although most will outgrow this behaviour. When involuntary, echolalia may be considered a tic.
It has been observed after cerebral infarction (stroke).
Immediate echolalia causes the immediate repetition of a word or phrase.
A typical pediatric presentation of echolalia might be as follows: a child is asked "Do you want dinner?"; the child echoes back "Do you want dinner?", followed by a pause, and then a response, "Yes. What's for dinner?"
In delayed echolalia, a phrase is repeated after a delay, such as a person with autism who repeats TV adverts, favourite movie scripts, or parental reprimands.
See also 
|Look up echolalia in Wiktionary, the free dictionary.|
- Henry George Liddell; Robert Scott. "ἠχώ". A Greek - English Lexicon, on Perseus. Retrieved 11 May 2012.
- Henry George Liddell; Robert Scott. "λαλιά". A Greek - English Lexicon, on Perseus. Retrieved 11 May 2012.
- Simon N (1975). "Echolalic speech in childhood autism. Consideration of possible underlying loci of brain damage". Arch. Gen. Psychiatry 32 (11): 1439–46. PMID 812450.
- Suzuki T, Itoh S, Hayashi M, Kouno M, Takeda K (July 2009). "Hyperlexia and ambient echolalia in a case of cerebral infarction of the left anterior cingulate cortex and corpus callosum". Neurocase 15 (5): 1–6. doi:10.1080/13554790902842037. PMID 19585352.
- Bashe, P. R. The OASIS Guide to Asperger Syndrome; Advice, Support, Insight, and Inspiration. Crown Publishers, 2001, p. 22.