Lecturer's Précis - Morton (1979)

Copyright Notice: This material was written and published in Wales by Derek J. Smith (Chartered Engineer). It forms part of a multifile e-learning resource, and subject only to acknowledging Derek J. Smith's rights under international copyright law to be identified as author may be freely downloaded and printed off in single complete copies solely for the purposes of private study and/or review. Commercial exploitation rights are reserved. The remote hyperlinks have been selected for the academic appropriacy of their contents; they were free of offensive and litigious content when selected, and will be periodically checked to have remained so. Copyright © 2002-2018, Derek J. Smith.


First published online 08:42 BST 1st May 2002, Copyright Derek J. Smith (Chartered Engineer). This version [2.0 - copyright] 09:00 BST 3rd July 2018.

An earlier version of this material appeared in Smith (1997; Chapter 5). It is repeated here in simplified form and supported with hyperlinks.


Morton (1979)

See firstly the supporting commentary for this material, and Morton (1964).


Morton's (1979) "Logogen" Model: Here is Morton's (1979) revision of his own 1964 model. The dictionary in the early model is now replaced by the logogen system box (pink, centre), a process which contains and manages the mind's lexical datastore. In addition, the selection and context effects are now merged into a single cognitive system (far left). This layout is not only entirely typical of all later transcoding models, but is also totally consistent with the nineteenth century aphasiologists' tradition of separating surface word forms from their meaning (see, for example, Freud, 1891).

If this diagram fails to load automatically, it may be accessed separately at



Redrawn from Morton (1979:138). This version Copyright © 2002, Derek J. Smith.