Hoover, David L. "Testing Burrows's Delta." Literary and Lingusitic Computing 19, no. 4 (2004): 453-475.
Hoover, David L. "Delta Prime?" Literary and Lingusitic Computing 19, no. 4 (2004): 477-495.
Delta is a unitary measure of authorial and stylistic differences recently proposed by John Burrows. In "Testing Burrows's Delta," Hoover explores the effectiveness of Delta across various types of texts (e.g., poetry, prose), across British and American authors, in prose employing third-person narration, and in large collections of heterogeneous texts. In "Delta Prime?" Hoover offers several modifications of Delta that seem helpful in specific situations. Overall, Hoover sees Delta as a flexible and powerful measure that promises to prove especially helpful in authorship attribution research.