LOGOGEN
المؤلف:
John Field
المصدر:
Psycholinguistics
الجزء والصفحة:
P165
2025-09-13
412
LOGOGEN
A mechanism which collects evidence of the presence of a word in spoken or written input. An early activation model of lexical access (Morton, 1969) is based upon a system of thousands of logogens, each responsible for a single word in the user’s lexicon. As evidence for a particular word accumulates, the activation of its logogen increases. Each logogen has a ‘threshold’. When it reaches the threshold, it ‘fires’ and the word is treated as identified. At this point, the listener/reader is able to access the cognitive system for information about the word, including its meaning. (Note that this implies that meaning is not accessed until after recognition.) The speaker/writer is able to transmit the word to a response buffer, where it is stored, ready to be uttered.
Once a logogen has fired, its activation level only endures for about a second before decaying. However, it does not return to its original value for some considerable time. In this way, the model accounts for repetition priming effects, where a word is recognised more readily if it has been heard recently. Furthermore, each time a logogen reaches its threshold, the threshold is lowered a little: thus accounting for frequency effects, where words of high frequency are recognised more rapidly than infrequent ones.
See also: Activation, Lexical access
Further reading: Harris and Coltheart (1986)
الاكثر قراءة في Linguistics fields
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