Lie Detection tests – false claim examinations

These days the lie detection tests have been considered as a cultural icon mainly in crime drams and comedies and even in advertisements. The instrument which is used in polygraph tests or lie detection tests includes a physiological recorder. This does the assessment using 3 indicators based on the autonomic arousal of skin conductivity, respiration and blood pressure or heart rate.

Today, majority of the lie detection tests makes use of computerized recording systems in their tests. They make use of pneumographs to measure the depth and rate of respiration. This will be wrapped around the individual’s chest. They make use of blood pressure cuff to measure the cardiovascular activity. By attaching electrodes to the fingertips of the individual they measure the skin conductivity.

As a part of examination, along with recording instruments individual is asked series of questions. There will be a pretest phase where the subject will be explained about the techniques used in the examination. Sometimes there will be stimulation test which helps in demonstrating the accuracy of the detecting deception.


False claim examinations:

We can find significant public and scientific controversy when it comes to lie detection tests. Some of the scientists and psychologists say that there is little base for the validity of the lie detection tests.

Majority of the courts in many states usually reject the polygraph evidence. This is because of its inherent unreliability. But even today in most of the non judicial settings, lie detection tests are commonly used. It is used to monitor the criminal offenders on probation, to assess the veracity of the witnesses and suspects, and even to screen personnel. Polygraph tests or lie detection tests are even used to convince others about an individual’s innocence, and even by private corporations and agencies for little narrow range of situations.

The currently used lie detection tests are based on observing the physiological functionalities. But these are not based on the psychological research. But of course many believe that deception demands efforts and it is better to monitor the physiological changes.

But when it comes to the nature of deceptiveness, basic research is remained limited. Some have opinion that it will be problematic when it comes to lie detection tests when there is no proper theoretical understanding. That is why one must remain skeptical when it comes to conclusions drawn by polygraph tests.

There is lack of study and research regarding polygraph tests. But there are lot of efforts ongoing when it comes to developing new approaches. Some of the methods already use autonomic physiologic indicators like skin temperatures and cardiac output. But these are more likely to help deception than polygraph test itself. Even though polygraph or lie detection tests lacks when it comes to proper evidence they are used around the globe in many businesses and corporations.

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