Published online by Cambridge University Press: 01 February 1999
Lexemes supposedly represent phonological but not grammatical information. Phonological word substitutions pose problems for this account because the target and error almost always come from the same grammatical class. This grammatical congruency effect can be explained within the Levelt et al. lexicon given that (1) lexemes are organized according to phonological similarity and (2) lexemes from the same grammatical category share phonological properties.