cognitive psychology – language

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Patients with anomia sometimes have category-specific naming deficits.  We discussed three theories in class that attempt to explain why this happens: Physical vs Functional Properties (Warrington), Fundamental Categorical Organization (Caramazza), and Complexity of Features (Tyler). In your own words, describe how each of these theories attempts to explain why brain damage could affect the ability to recall the name of objects from some categories, but not others.