Abstract
Referential and conversational speech tasks were used to investigate the speech, language, and communication skills of five neurologic-ally normal and five demented subjects. Measures of communication success, efficiency, and learning were derived from referential task performance. Communication behaviours were categorized and quantified from utterances of the conversation and referential tasks. Analysis of results revealed relatively intact speech and grammar for the demented subjects despite disruptions in the success and efficiency of communicative interaction. The results support the clinical observation of impaired communication and preserved speech and grammar skills in dementia.
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