Word Retrieval in Normal and Aphasic Speakers

			      Gary Dell
			University of Illinois


   Freud believed in the continuity between normal and abnormal
behavior.  In the case of language and language impairments he wrote,
"the paraphasia in aphasic patients does not differ from the incorrect
use and the distortion of words which the healthy person can observe
in himself in states of fatigue." I argue that Freud was right by
developing an interactive activation model of lexical retrieval in
language production, fitting that model to normal error behavior, and
then showing that simple quantitative changes in the model's
processing characteristics can explain the variety of lexical error
patterns in aphasia.