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Dual-coding theory is a theory of cognition that suggests that the mind processes information along two different channels; verbal and nonverbal. It was hypothesized by Allan Paivio of the University of Western Ontario in 1971.
Allan Paivio's dual-coding theory is a basis of picture superiority effect. Paivio claims that pictures have advantages over words with regards to coding and retrieval of stored memory because pictures are coded more easily and can be retrieved from symbolic mode, while the dual coding process using words is more difficult for both coding and retrieval.
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According to Paivio’s dual -coding theory, concrete concepts are the one that is remembered easier from their perceptual memory codes. [6] Evidence has shown that when words are heard they are associated with a concrete concept and are re-enact any previous interaction with the word within the sensorimotor system. [7]
The "dual coding theory (DCT)" [15] contrasts multiple and common coding theories. DCT is "an internalized nonverbal system that directly represents the perceptual properties and affordances of nonverbal objects and events, and an internalized verbal system that deals directly with linguistic stimuli and responses". [15]
According to dual-coding theory, recognition of a memory stimulus can be studied via two cognitive mechanisms: recollection and familiarity. Familiarity is context-free, or independent of the context in which the stimulus was encoded, and concerns whether a person "knows" they have encountered a stimulus previously.
Multiple code theory (MCT) is a theory that conceives of the human brain as processing information in three codes. A certain issue can be coded in three languages, via symbolic verbal information (letters), symbolic nonverbal information (images), and pre-symbolic information (body feeling).
A self-dual code is one which is its own dual. This implies that n is even and dim C = n /2. If a self-dual code is such that each codeword's weight is a multiple of some constant c > 1 {\displaystyle c>1} , then it is of one of the following four types: [ 1 ]