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Several studies have found PCS to be more transparent than other graphic symbols such as Blissymbols. [2] A graphic symbol is transparent if "the shape, motion, or function of the referent is depicted to such an extent that meaning of the symbol can be readily guessed in the absence of the referent" (Fuller & Lloyd, 1991, p. 217).
PECS begins with teaching a student to exchange a picture of a desired item with a communicative partner, who immediately honors the request. After the student learns to spontaneously request for a desired item, the system goes on to teach discrimination among symbols and then how to construct a simple sentence.
Visual schedules use a series of pictures to communicate a series of activities or the steps of a specific activity. [1] [2] They are often used to help children understand and manage the daily events in their lives. [3]
The PECS program serves as another common intervention technique used to conform individuals with autism. [non-primary source needed] [11] As many as 25% of autistic individuals have no functional speech. [12] The program teaches spontaneous social communication through symbols or pictures by relying on ABA techniques.
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In circumstances and situations there are certain methods and systems that are used as benchmarks, guidelines or protocols for communication, measurement, orientation, reference for information, science, symbols and time. These standards are employed to universally convey meaning, classification and to relate details of information.
(See Organizational Theory) Once a symbol is known in a society, it is habitual for an individual to respond to it exactly like how they would previously. If a symbol is given that is not known in one's own society, the response will take longer. This is because the individual does not know what the symbol actually means to the source.
In computing and telecommunications, a control character or non-printing character (NPC) is a code point in a character set that does not represent a written character or symbol. They are used as in-band signaling to cause effects other than the addition of a symbol to the text.