A popular way on many crime dramas to determine if a suspect is lying or telling the truth is by hooking them up to a polygraph machine. In a matter of a minute the police are able to determine if the suspect is lying and guilty or, on the rare occasion, telling the truth and innocent. But, one has to wonder, is it really that simple? Polygraphs measure four main factors that are thought to change when a lie is told and more importantly, it is assumed that these changes indicate deception. The four main factors are blood pressure, heart beat, perspiration, and breathing and these are recorded by using simple devices. It is important to note from the beginning that those who question the reliability of polygraphs do not doubt the reliability of the measurements, but the ability of the measurements to indicate and/or prove deception. Even though doubt exists as to the reliability, polygraphs are used not only in law enforcement settings, but also in intelligence agencies, in the maintaining security of industry, and for public safety and service around the world. Despite its prevalence, there are many groups that call into question the effectiveness, reliability, and fairness of polygraph testing. This paper will explore this question by first looking into the history of polygraphs including court rulings and how polygraph tests are done, then current use, and finally looking at sources of bias and error in the test and the process.
Means of lie detection were used far before the modern polygraph was invented. For example, in the 18th century, a person’s hand was placed in a boiling pot of water and if their hand burned, then they were determined to be lying (The History and Basic Facts of Polygraph, 2009). Eventually the...
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...l question") with his/her response to a question concerning the matter being investigated” (a relevant question) (Polygraph FAQ, 2006). “If reactions to the "control" question are greater, the subject is deemed truthful. If reactions to the question on which the polygrapher is attempting to determine truth or deception are greater, the subject fails. If reactions to both are approximately the same in size, the test is termed inconclusive.” (Polygraph FAQ, 2006).
Works Cited
Polygraph FAQ. (2006). Retrieved from Antipolygraph.org: http://antipolygraph.org/faq.shtml
The History and Basic Facts of Polygraph. (2009). Retrieved from Aachen Polygraph Associates: http://polygraphexaminer.com/polygraph-history.html
Polygraph Laws Regarding Admissibility. (2011). Retrieved from ThePolygraphExaminer.com: http://www.thepolygraphexaminer.com/polygraph_laws.htm
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In “The Interview” by Douglas Starr, He talks about the different techniques they use when interrogating suspects to determine whether the suspect is lying. One technique they use is called the Reid Technique and that is when
After reviewing the article “Inside Interrogation: The Lie, The Bluff, and False Confessions”, it became very evident the huge problem with interrogations and false confessions in the criminal justice system is with false confession. Jennifer T. Perillo and Saul M. Kassin crafted three distinct experiments to try and better understand false confessions and how trues the actual numbers in real life are. What Perillo and Kassin were trying to prove is that “the bluff technique should elicit confessions from perpetrators but not from innocents” (Perillo, Kassin 2010). What is called the “Bluff Technique” is an interrogation technique that uses a sort of threat or hint that there is certain proof that a person will think is more of a promise for
This paper will consider eye witness testimony and its place in convicting accused criminals. Psychology online (2013) defines “eye witness testimony” as a statement from a person who has witnessed a crime, and is capable of communicating what they have seen, to a court of law under oath. Eye witness testimonies are used to convict accused criminals due to the first hand nature of the eye witnesses’ observations. There are however many faults within this system of identification. Characteristics of the crime is the first issue that will be discussed in this paper, and the flaws that have been identified. The second issue to be discussed will be the stress impact and the inability to correctly identify the accused in a violent or weapon focused crime. The third issue to be discussed is inter racial identification and the problems faced when this becomes a prominent issue. The fourth issue will be time lapse, meaning, the time between the crime and the eye witness making a statement and how the memory can be misconstrued in this time frame. To follow this will be the issue of how much trust jurors-who have no legal training-put on to the eye witness testimony, which may be faltered. This paper references the works of primarily Wells and Olsen (2003) and Rodin (1987) and Schmechel et al. (2006) it will be argued that eye witness testimony is not always accurate, due to many features; inter racial identification, characteristics of the crime, response latency, and line up procedures therefore this paper will confirm that eyewitness testimonies should not be utilised in the criminal ju...
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(Kennedy & Haygood, 1992; Williams & Loftus, 1994), which is worrying considering the growing and substantial body of evidence from laboratory studies, field studies, and the criminal justice system supporting the conclusion that eyewitnesses frequently make mistakes (Cutler & Penrod, 1995; Huff, 1987; Huff, Rattner, & Sagarin, 1986; Innocence Project, 2009; Wells, Small, Penrod, Malpass, Fulero, & Brimacombe, 1998). According to a number of studies, eyewitness misidentifications are the most common cause of wrongful convictions (Huff, Rattner, & Sagarin, 1986; Wells et al., 1998; Yarmey, 2003) and, through the use of forensic DNA testing, have been found to account for more convictions of innocent individuals than all other factors combined (Innocence Project, 2009; Wells, Memon, & Penrod, 2006).
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In Laurence Armand French Ph.D. and Thomas J. Young Ph.D.’s article The False Memory Syndrome: Clinical/Legal Issues for the Prosecution talks about memory recall being an unreliable form of evidence in the Criminal Justice System. French and Young state that hypnosis and lie detector tests are a misconception because “the cognitive interpretations of the emotional/autonomic aspects of the central nervous (CNS) and peripheral nervous systems are not true indicators of reality,” (p. 38).
Many of today’s interrogation models being utilized in police investigations have an impact on false confessions. The model that has been in the public eye recently is the social psychological process model of interrogation known as the “The Reid Technique.” There are two alternatives used by the police today to replace the Reid Technique, one is the PEACE Model and the other is Cognitive Interviewing. These methods are not interrogation techniques like Reid but interview processes.
There has been considerable debate worldwide, regarding the accuracy of eyewitness testimony in the criminal justice system. Particularly, arguments have surrounded wrongful convictions that have resulted from incorrect eyewitness evidence (Areh, 2011; Howitt, 2012; Nelson, Laney, Bowman-Fowler, Knowles, Davis & Loftus, 2011). The purpose of this essay is to consider psychological research about the accuracy of eyewitness testimony and its placement in the criminal justice system. Firstly, this essay will define how eyewitnesses and their testimonies are used within the criminal justice system and the current debate surrounding its usage. Secondly, the impact of post-identification feedback will be used to show the affect on the confidence of a witness. Thirdly, studies around gender related differences will show how a witnesses gender can affect memory recall and accuracy. Fourthly, empirical studies will be used to highlight how a psychological experience called change blindness can cause mistakes in eyewitness identification. Finally, the effect of cross-examination will be used to explore the impact on eyewitness accuracy. It will be argued, that eyewitness testimony is not accurate and highly subjective, therefore, the criminal justice system must reduce the impact that eyewitness testimony is allowed to have. Developing better policies and procedures to avoid wrongful convictions by misled judges and jury members can do this.
The polygraph is a very controversial topic when comes to the introduction of the techniques into court. The polygraph technique has not changed since first developed in 1895. What the polygraph does is measures the blood pressure fluctuation, pulse rate and respiratory rate changes. The rate of the blood pressure, pulse and respiratory rate not only changes due to the body being stressed because the person is lying, but it also changes due to anxiety, anger and medical conditions. This will affect the accuracy on the technique and give inconsistent readings within the results (Gailus, C., 2008, November
“A good liar uses the truth.” This is a technique used by notorious imposters Frederic Bourdin, and Frank Abagnale. Although Bourdin posed as a child for a second chance at adolescence, Abagnale posed as an adult to gain financial means and respect. Bourdin and Abagnale’s success in deception can be primarily attributed to their careful observation of their surroundings, as well as their ability to detect the emotions of those around them.
Eyewitness identification and testimony play a huge role in the criminal justice system today, but skepticism of eyewitnesses has been growing. Forensic evidence has been used to undermine the reliability of eyewitness testimony, and the leading cause of false convictions in the United States is due to misidentifications by eyewitnesses. The role of eyewitness testimony in producing false confessions and the factors that contribute to the unreliability of these eyewitness testimonies are sending innocent people to prison, and changes are being made in order to reform these faulty identification procedures.
Lying is an issue that has been debated on for a long time. Some people believe that lying is sometimes ok in certain circumstances. Some people believe lying is always acceptable. In contrast, some believe lying is always bad. Keeping all other’s opinions in mind, I believe that lying is a deficient way of solving problems and is a bad thing. I claim that only certain situations allow the usage of lies and that otherwise, lying is bad. Dishonesty is bad because it makes it harder to serve justice, harms the liar individually, and messes up records. Furthermore, it should only be said to protect someone from grave danger.
Leo, R and Ofshe R. The Social Psychology of Police Interrogation: The Theory and Classification of True and False Confessions. 16 Studies in Law, Politics and Society 189,