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The polygraph, often portrayed as a magic mind-reading machine, is still controversial among experts, who continue heated debates about its validity as a lie-detecting device. As the nation takes a fresh look at ways to enhance its security, can the polygraph be considered a useful tool? The Polygraph and Lie Detection puts the polygraph itself to the test, reviewing and analyzing data about its use in criminal investigation, employment screening, and counter-intelligence. The book looks at: The theory of how the polygraph works and evidence about how deceptivenessâ€"and other psychological conditionsâ€"affect the physiological responses that the polygraph measures. Empirical evidence on the performance of the polygraph and the success of subjects' countermeasures. The actual use of the polygraph in the arena of national security, including its role in deterring threats to security. The book addresses the difficulties of measuring polygraph accuracy, the usefulness of the technique for aiding interrogation and for deterrence, and includes potential alternativesâ€"such as voice-stress analysis and brain measurement techniques.
Evidence-Based Practice (EBP) has over the last decade made an increasing mark in several fields, notably health and medicine, education and social welfare. In recent years it has begun to make its mark in criminal justice. As engagement with EBP has spread, it has begun to evolve from what might be regarded as a somewhat narrow doctrine and orthodoxy to something more complex and various. Often criminological research has been at odds with the assumptions, conventions and methodologies associated with first generation EBP. In that context EBP poses a challenge to the research community and existing evidence base and is, accordingly, hotly controversial. This book is a welcome and timely contribution to current debates on evidence-based practice in policing. With a sharp conceptual focus, the chapters provide a critical examination of the recent history of EBP in academic, policy and practitioner communities, evaluate key dimensions of its application to policing, challenge established understandings and pave the way for a much needed change in how research 'evidence' is perceived, generated, transferred, implemented and evaluated.
Throughout history, there has been an intrinsic need for humans to detect deception in other humans. Developed in 1923, the polygraph machine was a tool designed to do just this. To date, there have been many improvements made to the basic polygraph instrument. This book outlines the instrumentation as well as the latest in questioning techniques and methods available to the professional interviewer to determine truth from deception. The book covers psychology and physiology, a history of polygraph with the advances of leading figures, question formulation, data analysis, legal implications and legal cases, and the author’s developed technique Integrated Zone Comparison Technique (IZCT).