Lecturer's Précis - Lordat (1843)

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 © 2003-2018, Derek J. Smith.

First published 10:00 GMT 28th October 2003. This version [2.0 - copyright] 09:00 BST 9th July 2018.

Although this paper is reasonably self-contained, it is best read as a subordinate file to our e-paper on "Speech Errors and Speech Production Models". An earlier version of this material appeared in Smith (1997; Chapter 6). It is repeated here with a colour-coded graphic and supported with hyperlinks.

Lordat's (1843) Stages of Sentence Production

The French army surgeon, Jacques Lordat (1773-1870) was one of the first to analyse speech production as a succession of processing stages. He identified five main stages as shown diagrammatically below .....

Lordat's "Boxology": This is Lecours, Nespoulos, and Pioger's (1987) rendering into block diagram form of Lordat's (1843) analysis of the stages of the speech production process. Five processing stages are identified. Stage 1 shows ideas emerging from the process(es) of thinking in general, and being "isolated" in readiness for utterance. Stages 2 to 4 show the progressive internal preparations of a syntactically precise output sentence, and Stage 5 shows the final delivery of that sentence as sounds. Note that Stage 5 consists of three separate subprocesses, thus drawing attention to the need to identify the physical processing modules as well as the processes themselves on this sort of diagram.

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



Developed from a black and white original in Lecours, Nespoulos, and Pioger (1987, p8), but with colour coding added. This version Copyright © 2003, Derek J. Smith.