Abstract
Both domain-specific and expertise accounts of category specialization assume that generalization occurs within a domain but not between domains. Yet it is often difficult to define the boundaries and critical features of object domains. Differences in how categories are defined make it difficult to adjudicate between accounts of category specificity and may lead to contradictory results. For example, evidence for whether car experts recruit the fusiform face area is mixed, and this inconsistency may be due to the inclusion of antique cars in one of those previous studies (e.g., Grill-Spector, Knouf, & Kanwisher, 2004). The present study tested the generalization of expertise from modern to antique cars and found that modern-car experts showed expert discrimination and holistic processing of modern cars but not of antique cars. These findings suggest that the neural specialization underlying perceptual expertise is highly specific and may not generalize to distinct subclasses, even when they share some degree of perceptual and conceptual features.
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This research was supported by the James S. McDonnell Foundation and Grant 2 R01 EY013441-06A2 to I.G., by Center Grant P30-EY008126, and by a faculty research grant to C.M.B. and an undergraduate research award to W.S.P., both from the University of Richmond.
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Bukach, C.M., Phillips, W.S. & Gauthier, I. Limits of generalization between categories and implications for theories of category specificity. Attention, Perception, & Psychophysics 72, 1865–1874 (2010). https://doi.org/10.3758/APP.72.7.1865
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DOI: https://doi.org/10.3758/APP.72.7.1865