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## The Polygraph and Lie Detection (2003) Board on Behavioral, Cognitive, and Sensory Sciences (BBCSS)Committee on National Statistics (CNSTAT)

### Citation Manager

. "Appendix H: Quantitative Assessment of Polygraph Test Accuracy." The Polygraph and Lie Detection. Washington, DC: The National Academies Press, 2003.

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The Polygraph and Lie Detection

and may also have different standard deviations (a measure of spread). To extrapolate an ROC curve from only one point using this Gaussian model requires that we additionally assume these standard deviations are equal. Figure H-2 shows six theoretical ROCs from this “equivariance” binormal model, with respective A values of 0.5, 0.6, 0.7, 0.8, 0.9, 0.95, along with the reverse diagonal line corresponding to sensitivity = (1– false positive rate), which can alternately be interpreted as false positive rate = false negative rate. On this line, the probability that the test is correct is the same whether the examinee is deceptive or nondeceptive. The intersection of each ROC with this line highlights the difference be-

FIGURE H-2 Six theoretical ROC curves from the “equivariance” binormal model.

NOTE: Curves are binormal equivalence ROCs with accuracy index (A) values of 0.5, 0.6, 0.7, 0.8, 0.9, and 0.95.

 Page 343
 Front Matter (R1-R18) Executive Summary (1-10) 1 Lie Detection and the Polygraph (11-28) 2 Validity and Its Measurement (29-64) 3 The Scientific Basis for Polygraph Testing (65-105) 4 Evidence from Polygraph Research: Qualitative Assessment (106-120) 5 Evidence from Polygraph Research: Quantitative Assessment (121-153) 6 Alternative Techniques and Technologies (154-177) 7 Uses of Polygraph Tests (178-211) 8 Conclusions and Recommendations (212-231) References (232-252) Appendix A: Polygraph Questioning and Techniques (253-258) Appendix B: Use of Polygraph Screening in the U.S. Department of Energy and Other Federal Agencies (259-279) Appendix C: The Wen Ho Lee Case and the Polygraph (280-285) Appendix D: Physiological Processes Measured by the Polygraph (286-290) Appendix E: Historical Notes on the Modern Polygraph (291-297) Appendix F: Computerized Scoring of Polygraph Data (298-322) Appendix G: Process for Systematic Review of Polygraph Validation Studies (323-339) Appendix H: Quantitative Assessment of Polygraph Test Accuracy (340-353) Appendix I: False Positive Index Values for Polygraph Testing (354-357) Appendix J: Decision Analysis of Polygraph Security Screening (358-363) Appendix K: Combining Information Sources in Medical Diagnosis and Security Screening (364-374) Appendix L: Biographical Sketches of Committee Members and Staff (375-380) Index (381-398)