Mapping dissociations in verb morphology

Aureliu Lavric, Diego Pizzagalli, Simon Forstmeier, Gina Rippon

Research output: Contribution to journalArticlepeer-review


Substantial behavioural and neuropsychological evidence has been amassed to support the dual-route model of morphological processing, which distinguishes between a rule-based system for regular items (walk–walked, call–called) and an associative system for the irregular items (go–went). Some neural-network models attempt to explain the neuropsychological and brain-mapping dissociations in terms of single-system associative processing. We show that there are problems in the accounts of homogeneous networks in the light of recent brain-mapping evidence of systematic double-dissociation. We also examine the superior capabilities of more internally differentiated connectionist models, which, under certain conditions, display systematic double-dissociations. It appears that the more differentiation models show, the more easily they account for dissociation patterns, yet without implementing symbolic computations.
Original languageEnglish
Pages (from-to)301-308
Number of pages8
JournalTrends in Cognitive Sciences
Issue number7
Publication statusPublished - 1 Jul 2001


  • past tense
  • morphology
  • dissociations
  • single-route
  • dual-route


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