Preliminary Credibility Assessment Screening … Credibility Assessment Screening System (PCASS): A...
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![Page 1: Preliminary Credibility Assessment Screening … Credibility Assessment Screening System (PCASS): A Status Report Defense Academy for Credibility Assessment (DACA) Tuesday, April 08,](https://reader033.fdocuments.us/reader033/viewer/2022052711/5ac2c1b57f8b9aae1b8b82cd/html5/thumbnails/1.jpg)
Tuesday, April 08, 2008 1
Preliminary Credibility Assessment Screening System (PCASS): A Status Report
Defense Academy for Credibility Assessment (DACA)
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UNCLASSIFIED
UNCLASSIFIED
Background
• Highly automated • Minimal training requirements• Well understood sensors and testing
techniques• Ruggedized platform• Development under contract by CIFA
– COTS Platform: Ranger handheld computer– Lafayette Instrument: Operating software, peripherals– Applied Physics Lab: Algorithm
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UNCLASSIFIED
UNCLASSIFIED
Capabilities
• Rapid initial personnel screening (triage)• Laboratory studies: decisions 80% - 92%
accurate, excluding inconclusives• Weighted algorithm• Field assessment in Iraq and Qatar
– About 40 minutes per exam– Training and internship are adequate– Positive customer survey responses
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UNCLASSIFIED
UNCLASSIFIED
The Way Ahead
• Briefings to Congress, media• Acquisition of PCASS units• Training in Iraq for initial standup• Establish programs• Establish oversight
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UNCLASSIFIED
UNCLASSIFIED
Limitations
• For initial screening only• Physiological recording
– Testing room– Examinee health and physiological state– Close adherence to test protocol
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UNCLASSIFIED
UNCLASSIFIED
Discussion
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Department of DefenseDepartment of Defense
Polygraph InstitutePolygraph Institute
PRELIMINARY CREDIBILITY PRELIMINARY CREDIBILITY ASSESSMENT SCREENING SYSTEMASSESSMENT SCREENING SYSTEM
(PCASS)(PCASS)
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BackgroundBackground
Need for aids in determining credibility
Use of unvalidated technologies by the DoD
Interim Department of Defense Policy for “Truth” Credibility Assessment, 8 June 2004
CIFA directed to identify and field valid technology for rapid screening by troops
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Concept of Operations Concept of Operations Provide an initial screening system:
Decision assistance to triage detainees, prisoners or persons of interest for further processingImprovement over existing credibility assessment systems
IntuitionInvalid techniques/technologies
Requires limited trainingField operableHighly portable
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Conceptual OverviewConceptual Overview
PCASS Test
Galvanic Skin Resistance
PCASSInterview Algorithm
Result
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Decision ScreenDecision Screen
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PCASS AlgorithmPCASS Algorithm
Contractor: Johns Hopkins University Applied Physics Laboratory
Based on confirmed data from field polygraph cases
Decision rules minimize errors with deceptive examinees
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4040--Hour Training CourseHour Training Course
24 hours of classroom instruction
16 hrs of laboratory practica8 or more lab exercisesLab exercises essential to competency
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LimitationLimitationPCASS is only for initial screening
Generally, adverse results should be followed up with other methods
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DiscussionDiscussion