In the remainder of this article, we take the further step of relating the present results to computational models of word reading developed within the “triangle” framework (Plaut et al., 1996 and Seidenberg and McClelland, 1989). Such models provide
explicit mechanistic accounts of how tasks such as reading aloud are performed, and therefore could be useful in narrowing the interpretation of the present results. There is also considerable interest in developing computational theories of behavioral phenomena such as reading that are closely linked to and constrained by facts about the Everolimus in vitro neurobiological substrate (Barber and Kutas, 2007 and Laszlo and Plaut, 2012). A meta-analytic approach by Taylor et al. this website (2013)
is particularly relevant in that they investigated whether evidence from existing functional neuroimaging studies can adjudicate between dual-route and triangle models of reading. Their study offers a potentially useful framework for how cognitive models and functional neuroimaging can inform each other and advance both approaches. Their results are inconclusive, however, observing that even with their meta-analytic approach it remains difficult to use functional neuroimaging to adjudicate between the models. They note that the implementation of semantic processing in the triangle model distinguishes it from the dual-route model, at least in the domain of reading aloud. However, their analysis of activations for reading spelling-sound inconsistent compared to consistent words selleck compound was only significant in left inferior frontal cortex, a region that is also associated with domain-general effects such as working memory or time-on-task (Cattinelli et al., 2013, Derrfuss et al., 2005 and Owen et al., 2005). The lack of activation for this condition in areas more typically associated
with semantic processing, such as the ITS region considered here, left open the possibility that activation for inconsistent greater than consistent words could reflect either lexical semantic (consistent with the triangle model) or lexical non-semantic (consistent with the dual-route model) processing. That the ITS ROI used in the current study is based on an area that (1) showed increasing activation for words of decreasing consistency, and (2) is located in an area reliably associated with lexical semantic processing across numerous studies (Binder et al., 2009 and Cattinelli et al., 2013), suggests it reflects a neural substrate for the involvement of semantics in reading aloud. The dual-route approaches (Coltheart et al., 2001 and Perry et al., 2007) then turn out to be less useful in the present context because they assume that reading aloud normally does not involve semantics. The “dual routes” are procedures for generating phonology from print.
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