Sentence context influences the interpretation of word meaning by Alzheimer patients

This study examined whether, in Alzheimer patients, verbal context selectively activates elements of a word's meaning that are relevant to the context. Subjects were shown a sentence ending in a target noun, followed by a question about an attribute of that target. The sentence primed either the attribute in the question, a different attribute, or no attribute. Both normals and AD patients answered the question faster when the target had appeared in a context priming that particular attribute. These results suggest that Alzheimer patients retain knowledge of semantic attributes and that these attributes are susceptible to contextual activation.