¶ … Detecting Deception
Polygraph Testing: A Critique
One of the most commonly used methods for detecting deception is the polygraph test. This is a procedure that combines skillful questioning techniques with physical measurements in order to determine stress levels that would indicate the presence of deception. It is widely used and is reliable enough to be used in a court of law, if it is properly handled and interpreted by an expert in the field. New advances are taking this same base for technology and increasing its scope and range. However, there are issues of reliability that do come up, especially in regards to when a suspect uses counter measures to throw off the test. Thus, polygraphs are excellent tools for detecting deception, but should not be trusted entirely on their own. Instead, they should be used in a combined effort with other interviewing techniques to really be effective in detecting deception.
Discussion
Using a lie detector test to determine if an individual is in deed telling the truth is one of the most popularly used method for evaluating truthfulness. It has been around for decades now, every since it was first invented in the early 1920s. According to the readings, "the best known of the psycho-physiological techniques is the polygraph, which measures heart rate, skin conductance and respiration while a person is answering a number of questions" (Cooper et al., 304). The test itself was invented by a police officer, showing its roots in criminal justice. During the procedure, a suspect is asked a series of questions. Many of these questions are purposely simple in order to set a baseline for potential lies. Tings like what is your name and other simple questions are asked fist in order to allow the person administering the test to see how the person reacts to honest answers. These baseline questions are then compared to more loaded questions,...
Application of Polygraph Testing in Selection c. Methodological Issues in Application of Polygraph Testing VI. Officer Selection Outcomes with and without Polygraph Testing a. Selection of Police Officers without Polygraph Testing b. Selection of Police Officers with Polygraph Testing c. Police Misconduct Incidents among Officers Selected without Polygraph Testing d. Police Misconduct Incidents among Officers Selected with Polygraph Testing VII. Conclusions a. The Effect of Polygraph Testing on Hiring b. The Effect of Polygraph Testing on Officer Integrity c.
Public policy makers in general and the police agency in particular should refrain from using the polygraph test in their selection of employees, particularly since, at worst, they may end up including potential robbers and murderers as part of their organization. The purpose of the followign study is to evalaute these conclusions by investigating the efficacy of polygraph tests in assessing police candidates Source Brett, a. Phillips, M., & Beary, J (1986)PREDICTIVE
(p. 214). In short, even if one is willing to overlook all of the glaring flaws with polygraphs and the ultimate impossibility of accurately measuring their accuracy, the best that can be said about them is that they detect deception better than random chance. Though it likely need not be said, "better than flipping a coin" seems a paltry justification for the still-widespread use of polygraphs in the criminal justice
Polygraph There has always been a search for a way in the social order regarding the degree of truthfulness or dishonesty in an individual. History reveals that there has been almost a universal constant endeavor to uncover the falsehood and know the truth. The Ancient Chinese, Arabs and Indians are known to have used methods from torture to duel fight for obtaining the truth and distinguish innocent and guilty (White Jr.,
Polygraph Reliability and Validity The validity and reliability of polygraph testing has been a subject of debate since such testing was first implemented almost a century ago (OTA, 1983, par. 1). Abundant research has been done on modern polygraph machines and techniques that has served to validate their use and their accuracy, however controversy still remains in the minds of many (Gougler et al., 2011, 196-201). One way to go about
The next step is evidence collection. Processing a crime scene without disturbing the evidences is a difficult task and investigators should take every precaution to gather evidence without affecting the crime scene. (GSA) Crime scene stepping pads' can be used for walking around the area without damaging potential evidences. Photographs and video must be taken before proceeding with the rough sketching around the crime scene. For this purpose 'crime scene
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