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A system of deception and fraud dete...

Humpherys, Sean LaMarc.

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A system of deception and fraud detection using reliable linguistic cues including hedging, disfluencies, and repeated phrases.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	A system of deception and fraud detection using reliable linguistic cues including hedging, disfluencies, and repeated phrases./
Author:	Humpherys, Sean LaMarc.
Description:	247 p.
Notes:	Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1142.
Contained By:	Dissertation Abstracts International72-02B.
Subject:	Language, Linguistics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3434361
ISBN:	9781124411705

A system of deception and fraud detection using reliable linguistic cues including hedging, disfluencies, and repeated phrases.
Humpherys, Sean LaMarc.

A system of deception and fraud detection using reliable linguistic cues including hedging, disfluencies, and repeated phrases. - 247 p.

Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1142.

Thesis (Ph.D.)--The University of Arizona, 2010.

Given the increasing problem of fraud, crime, and national security threats, assessing credibility is a recurring research topic in Information Systems and in other disciplines. Decision support systems can help. But the success of the system depends on reliable cues that can distinguish deceptive/truthful behavior and on a proven classification algorithm. This investigation aims to identify linguistic cues that distinguish deceivers from truthtellers; and it aims to demonstrate how the cues can successfully classify deception and truth.

ISBN: 9781124411705Subjects--Topical Terms:

1018079
Language, Linguistics.

A system of deception and fraud detection using reliable linguistic cues including hedging, disfluencies, and repeated phrases.
LDR:03778nam 2200361 4500 001 1400540
005 20111010080622.5
008 130515s2010 ||||||||||||||||| ||eng d
020 $a 9781124411705
035 $a (UMI)AAI3434361
035 $a AAI3434361
040 $a UMI $c UMI
100 1 $a Humpherys, Sean LaMarc. $3 1679603
245 1 2 $a A system of deception and fraud detection using reliable linguistic cues including hedging, disfluencies, and repeated phrases.
300 $a 247 p.
500 $a Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1142.
500 $a Advisers: Jay F. Nunamaker; Judee K. Burgoon.
502 $a Thesis (Ph.D.)--The University of Arizona, 2010.
520 $a Given the increasing problem of fraud, crime, and national security threats, assessing credibility is a recurring research topic in Information Systems and in other disciplines. Decision support systems can help. But the success of the system depends on reliable cues that can distinguish deceptive/truthful behavior and on a proven classification algorithm. This investigation aims to identify linguistic cues that distinguish deceivers from truthtellers; and it aims to demonstrate how the cues can successfully classify deception and truth.
520 $a Three new datasets were gathered: 202 fraudulent and nonfraudulent financial disclosures (10-Ks), a laboratory experiment that asked twelve questions of participants who answered deceptively to some questions and truthfully to others (Cultural Interviews), and a mock crime experiment where some participants stole a ring from an office and where all participants were interviewed as to their guilt or innocence (Mock Crime). Transcribed participant responses were investigated for distinguishing cues and used for classification testing.
520 $a Disfluencies (e.g., um, uh, repeated phrases, etc.), hedging words (e.g., perhaps, may, etc.), and interjections (e.g., okay, like, etc.) are theoretically developed as potential cues to deception. Past research provides conflicting evidence regarding disfluency use and deception. Some researchers opine that deception increases cognitive load, which lowers attentional resources, which increases speech errors, and thereby increases disfluency use (i.e., Cognitive-Load Disfluency theory). Other researchers argue against the causal link between disfluencies and speech errors, positing that disfluencies are controllable and that deceivers strategically avoid disfluencies to avoid appearing hesitant or untruthful (i.e., Suppression-Disfluency theory). A series of t-tests, repeated measures GLMs, and nested-model design regressions disconfirm the Suppression-Disfluency theory. Um, uh, and interjections are used at an increased rate by deceivers in spontaneous speech. Reverse order questioning did not increase disfluency use. Fraudulent 10-Ks have a higher mean count of hedging words.
520 $a Statistical classifiers and machine learning algorithms are demonstrated on the three datasets. A feature reduction by backward Wald stepwise with logistic regression had the highest classification accuracies (69%-87%). Accuracies are compared to professional interviewers and to previously researched classification models. In many cases the new models demonstrated improvements. 10-Ks are classified with 69% overall accuracy.
590 $a School code: 0009.
650 4 $a Language, Linguistics. $3 1018079
650 4 $a Business Administration, Management. $3 626628
650 4 $a Information Technology. $3 1030799
690 $a 0290
690 $a 0454
690 $a 0489
710 2 $a The University of Arizona. $b Management Information Systems. $3 1026782
773 0 $t Dissertation Abstracts International $g 72-02B.
790 1 0 $a Nunamaker, Jay F., $e advisor
790 1 0 $a Burgoon, Judee K., $e advisor
790 1 0 $a Goes, Paulo B. $e committee member
790 1 0 $a Chan, Erwin $e committee member
790 $a 0009
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3434361