“…The debate has broader relevance for cognitive science, given that the dual-route model is associated with a propositional, symbol-manipulating view of cognition (Marcus, 2001), whereas the single-route model has been driven by the development of connectionism and neural-network modeling. For the neuropsychologist, the past-tense controversy is of interest given the important role that cognitive and neural dissociations have played in fueling the debate; dissociations between regular and irregular morphology have been observed in data from acquisition (Brown, 1973;Kuczaj, 1977), psycholinguistics (Stanners, Neiser, Hernon, & Hall, 1979;Kempley & Morton, 1982;Napps, 1989;Sonnenstuhl, Eisenbeiss, & Clahsen, 1999), neuropsychology (Ullman et al, 1997;Marslen-Wilson & Tyler, 1997;Tyler, de Mornay Davies, et al, 2002), neuroimaging (Jaeger et al, 1996;Beretta et al, 2003;Sahin, Pinker, & Halgren, 2006;de Diego Balaguer et al, 2006), and electrophysiology (Münte, Say, Clahsen, Schiltz, & Kutas, 1999;Weyerts, Münte, Smid, & Heinze, 1996). In fact, the past-tense debate is largely one of how to interpret cognitive and neural dissociations.…”