Trace model

From Glottopedia
Revision as of 19:44, 29 August 2014 by NBlöcher (talk | contribs) (Removed the block {{format}})
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

Definition

The Trace model is an interactive model of auditory word recognition, meaning that the model allows an effect of sentence context at any moment during word recognition. In the connectionist TRACE model, word elements are represented by nodes in a network. These word nodes may be positively affected by excitatory connections with both lower (feature, phonemic) and higher (sentential) levels of representation. In this way, the likelihood of recognising a contextually appropriate word is influenced. Each cell in the network has a variable activation level and a threshold determining at which level of activation the cell starts to influence other cells: this influence may be either positive or negative (i.e. inhibitory connections). Selection of a word is defined in terms of competition between activated word nodes. The word node which in the end dominates all others will be recognised. The flow of information through the network is relatively slow. Therefore, effects of sentence context may only emerge later during processing, for instance during selection. Due to this delayed context effect, the model assigns somewhat more importance to the acoustic information than the logogen model.

Links

References

  • McClelland, J.L. & Elman, J.L. 1986. The TRACE model of speech perception., Cognitive Psychology, 18, 1-86
STUB
CAT This article needs proper categorization. You can help Glottopedia by categorizing it
Please do not remove this block until the problem is fixed.