Jules Davidoff a1 a1 Department of Psychology, Goldsmiths' University of London, Goldsmiths' College, London SE14 6NW, United Kingdom
j.davidoff@gold.ac.uk
Abstract
Evidence from aphasia is considered that leads to a distinction between abstract and concrete thought processes and hence for a distinction between rules and similarity. It is argued that perceptual classification is inherently a rule-following procedure and these rules are unable to be followed when a patient has difficulty with name comprehension and retrieval.
