Abstract
The theory of mind (ToM) deficit associated with autism has been a central topic in the debate about the modularity of the mind. Most involved in the debate about the explanation of the ToM deficit have failed to notice that autism’s status as a spectrum disorder has implications about which explanation is more plausible. In this paper, I argue that the shift from viewing autism as a unified syndrome to a spectrum disorder increases the plausibility of the explanation of the ToM deficit that appeals to a domain-specific, higher-level ToM module. First, I discuss what it means to consider autism as a spectrum rather than as a unified disorder. Second, I argue for the plausibility of the modular explanation on the basis that autism is better considered as a spectrum disorder. Third, I respond to a potential challenge to my account from Philip Gerrans and Valerie Stone’s recent work (Gerrans, Biol Philos 17:305–321, 2002; Stone and Gerrans, Trends Cogn Sci 10:3–4, 2006a; Soc Neurosci 1:309–319, 2006b; Gerrans and Stone, Br J Philos Sci 59:121–141, 2008).
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Notes
For additional diagnostic criteria, see the DSM-IV (American Psychiatric Association 2000, p. 75).
Psychiatrists distinguish between categorical and dimensional classificatory systems. The DSM-IV is a categorical system that “works best when all the members of a diagnostic class are homogenous, when there are clear boundaries between classes, and when the different classes are mutually exclusive” (American Psychiatric Association 2000, p. xxxi). Dimensional systems, however, are for disorders on continua. The current DSM-V task force is investigating how the “concept of spectrum disorders” can work alongside the traditional Axis I–Axis II distinction (Kupfer et al. 2002, p. xx).
See Baron-Cohen’s (2009) recent New York Times commentary.
Baron-Cohen (2009), however, argues that this is still an open question because there has been insufficient research into possible biological differences between individuals with autism and with Asperger’s.
Critics of MMT often presuppose without argument what they take to be Fodor’s view about informational encapsulation, i.e., that it is a necessary condition, leading them to argue that domain specificity would most often not be adaptive (see, e.g., Gerrans 2002, p. 310). Many have taken Fodor (1983) to be arguing that informational encapsulation is a necessary condition for a module, but Coltheart (1999) argues that on Fodor’s account informational encapsulation was only a characteristic or “typical” feature of a modular system and, in fact, Fodor does argue that the “notion of modularity ought to admit of degrees” (Fodor 1983, p. 37).
However, Karmiloff-Smith (2009, p. 59) has recently argued that her “neuroconstructivist” account accommodates modularity in the adult brain, insisting that it would arise during the “ontogenetic process of gradual modularization.”
I outline my criticisms of G&S’s (2008) account in more detail in Adams (forthcoming).
Similarly, when they attempt to explain behavior in other studies that I will not discuss, G&S (2008, p. 131) appeal only to “impaired low-level domain-specific mechanisms,” e.g., when explaining differences in performance between false-belief tests and false-photograph tests.
For a review of the literature, see Hill (2004).
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Acknowledgments
I wish to thank Edouard Machery and Arthur Falk for comments on a draft of this paper. I also thank Shannon Bernard-Adams for many conversations about clinical practice and Autism Spectrum Disorder.
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Adams, M.P. Explaining the theory of mind deficit in autism spectrum disorder. Philos Stud 163, 233–249 (2013). https://doi.org/10.1007/s11098-011-9809-z
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DOI: https://doi.org/10.1007/s11098-011-9809-z