Abstract

The psychologist and legal professional have an interest as important study of lie detection which revolves as one of the foremost areas of applied psychology. Indeed, in legal settings, police offices, and attorneys are among those make sure with the responsibility to determine clues which is important to know whether someone is lying or telling the truth in investigations, court trials, border control interviews and intelligence interviews. Therefore, psychologists and practitioners have developed various lie detection tools which cover entire possible range from observing behavior, analyzing speech, and measuring peripheral physiological responses to recording brain activity. This article will bring in the reader to the main lie detection tools and theories that underpinned to date in reference to deception.

Highlights

  • Evidence plays an essential role to establish a linkage between the suspects, crime, scene of crime and sometimes even the victim

  • Recorded response to each questions using polygraph are examined by skilled examiner where by and large, it is up to the examiner(s) to set the cut-off focuses at which a given reaction is demonstrative of misleading, trustworthiness or uncertain; whether to measure all channels and reactions or allocate more weight to a few; and in conclusion whether the general results show blame/duplicity, guiltlessness/genuineness or are just uncertain

  • Scientists, including members of the Society for Psychophysiological Research, hold negative views about the test who have the requisite background to evaluate the control question test are overwhelmingly skeptical of the claims made by polygraph proponent [24,25]

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Summary

Introduction

Evidence plays an essential role to establish a linkage between the suspects, crime, scene of crime and sometimes even the victim. Polygraph test resides on the principle that the fear of recognition and entrapment prompts a person to deceit from the actual fact which escort to a mental excitation which is further tried to conceal by physiological effort, known as “Defense mechanism”. In Polygraph test the machine detects, not lies, but arousal of emotions indirectly, only the physiological changes which immediately follow any sudden stress emotion.

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Conclusion

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