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This paper reports on a study of the relationship between acoustic-prosodic variation and discourse structurc, as determincd from an independent model of discourse. We present results of two pilot studies. Our corpus consisted of three AP news stories recorded by a professional speaker. Discourse structure was labeled by subjects either from text alone or from text (with all or-thographic markings except sentence-final punctuation renoved) and speech, following Grosz & Sidner 1986; average inter-labeler agreement for structural elements varied from 74.3%-95.1%, de-pending upon feature. These elements of global structure, together with elements of local structure such as parentheticals and attributive tags, were correlated with variation in intonational and acoustic features such as pitch range, contour, tirning, and amplitude. We found statistically significant associations between aspects of pitch range, amplitude …