utter lack of sympathetic and mutual responses to others that people with autism may externalize in conversational interaction (Barron and Barron 1992). People with autism are so committed to routine activity that when faced with change or inconsistency they can experience great anxiety. They are generally unable to interpret the emotions of others and the expectations of others in conversational interaction (Williams 1992). .
Nevertheless, while they may seem unaware to conversational interaction, they may at times repeat lengthy conversational interactions they have heard with absolute precision. People with autism seem to be locked into rigid understandings of the world, and unable to accommodate the give and take of normal conversational interaction. They have trouble making eye contact and physical contact, so face-to-face interactions are often frightening and intrusive (Williams 1992; Aarons and Gittens 1992; Frith 1989). .
(2) Impaired Communication.
What is especially difficult to understand in this characteristic is the way people with autism can easily master some language processes that are cerebral and be utterly incompetent in others that seem automatic to most people. People with autism display ease with syntax, but difficulty with pragmatics and communication in conversational interaction (Tager- Flusberg, Calkins, Nolin, Baumberger, Anderson and Chadwick-Dias 1990). .
They can employ interpersonal gestures, but not expressive gestures (Attwood, Frith and Hermelin 1988). They may like to make up nicknames and learn new things, but they can not talk about what they have just learned on demand. People with autism exhibit odd pronominal usage, often referring to themselves in the third person. They often speak in tones of voice that seem odd in typical conversation, walk on their tip-toes, and exhibit a faraway look in their eyes. .
People with autism have difficulty generalizing behavior and language from one situation to another, and they may experience anxiety when faced with any kind of language process that involves interpreting the demands and expectations of others.