List of language disorders..

[Martina Penke]

Dear Jon,

you might be interested in a paper that we recently wrote about a
constructivist neural network learning the German participle. After
training we lesioned the network and compared its performance with
agrammatic aphasic processing.

Here is the abstract:

We present a constructivist neural network that closely models the
performance of agrammatic aphasics on German participle
inflection. The network constructs a modular architecture leading to a
double dissociation between regular and irregular verbs, and lesioning
the trained network accounts for data obtained from aphasic subjects
(Penke et al. 1999, published in Brain + Language).

The paper is

A Constructivist Neural Network Model of German Verb Inflection in
Agrammatic Aphasia

Gert Westermann, David Willshaw, Martina Penke

and can be downloaded from

http://www.cogsci.ed.ac.uk/~gert/publications/icann99.pdf  or
http://www.cogsci.ed.ac.uk/~gert/publications/icann99.ps

A short paper with some more thoughts on the implications of this
model is called "Single Mechanism but not Single Route: Learning Verb
Inflections in Constructivist Neural Networks" and it's available at

http://www.cogsci.ed.ac.uk/~gert/publications/bbs.pdf   or
http://www.cogsci.ed.ac.uk/~gert/publications/bbs.ps