The attempt to spot deception through its correlates in human behavior has a long history. Until recently, these efforts have concentrated on identifying individual "cues" that might occur with deception. However, with the advent of computational means to analyze language and other human behavior, we now have the ability to determine whether there are consistent clusters of differences in behavior that might be associated with a false statement as opposed to a true one. While its focus is on verbal behavior, this book describes a range of behaviors-physiological, gestural as well as verbal-that have been proposed as indicators of deception. An overview of the primary psychological and cognitive theories that have been offered as explanations of deceptive behaviors gives context for the description of specific behaviors. The book also addresses the differences between data collected in a laboratory and "real-world" data with respect to the emotional and cognitive state of the liar. It discusses sources of real-world data and problematic issues in its collection and identifies the primary areas in which applied studies based on real-world data are critical, including police, security, border crossing, customs, and asylum interviews; congressional hearings; financial reporting; legal depositions; human resource evaluation; predatory communications that include Internet scams, identity theft, and fraud; and false product reviews. Having established the background, this book concentrates on computational analyses of deceptive verbal behavior that have enabled the field of deception studies to move from individual cues to overall differences in behavior. The computational work is organized around the features used for classification from -gram through syntax to predicate-argument and rhetorical structure. The book concludes with a set of open questions that the computational work has generated.

This volume will be of particular interest to readers interested in expanding the applications of corpus linguistics techniques through new tools and approaches. The text includes selected papers from the Fifth North American Symposium, hosted by the Linguistics Department at Montclair State University in Montclair New Jersey in May 2004. The symposium papers represented several areas of corpus studies including language development, syntactic analysis, pragmatics and discourse, language change, register variation, corpus creation and annotation, and practical applications of corpus work, primarily in language teaching, but also in medical training and machine translation. A common thread through most of the papers was the use of corpora to study domains longer than the word. Not surprisingly, fully half of the papers deal with the computational tools and linguistic strategies needed to search for and analyze these longer spans of language while most of the remaining papers examine particular syntactic and rhetorical properties of one or more corpora.