Previous research conducted by Ben-Shakhar, Bar-Hillel, and Kremnitzer (2002) implicated the validity of the GKT when correctly governed by the main criteria of Daubert, which is a standard used by a trial judge to make a preliminary assessment of an expert’s scientific testimony based on reasoning or methodology. These criteria include testability, known error rates, peer review and publication, and general acceptance.
Measuring the physiological changes applying a GKT, which is considered the most accurate (Lewis & Cuppari, 2009), does not determine guilt; however, it does suggest knowledge of the crime due to physiological arousal responses of set questions. This cognitive approach to the detection of psychophysiological responses relies on what one knows instead of conditioned responses (Ben-Shakhar, Bar-Hillel, & Kremnitzer, 2002). Previous studies have demonstrated that the GKT elicits a greater substantial physiological response from the …show more content…
Presumably, an innocent subject can appear guilty, therefore creating false-positive readings. In implementing polygraph techniques to determine deception, a researcher must also take into account that not all individuals who are guilty develop physiological changes. These changes can occur from nervousness, fear, and emotional distress when taking a polygraph test.
The present study investigated such physiological change (EDA) through the implementation of GKT. The detection of concealed information was based upon orienting or defensive responding. The researchers showed a pattern of consistent elevated EDA responses provoked by “guilty knowledge” questions. Larger EDA responses to questions containing cheating details compared to baseline measurements were examined. The findings suggest the subjects recognized details regarding cheating on a
Measuring the physiological changes applying a GKT, which is considered the most accurate (Lewis & Cuppari, 2009), does not determine guilt; however, it does suggest knowledge of the crime due to physiological arousal responses of set questions. This cognitive approach to the detection of psychophysiological responses relies on what one knows instead of conditioned responses (Ben-Shakhar, Bar-Hillel, & Kremnitzer, 2002). Previous studies have demonstrated that the GKT elicits a greater substantial physiological response from the …show more content…
Presumably, an innocent subject can appear guilty, therefore creating false-positive readings. In implementing polygraph techniques to determine deception, a researcher must also take into account that not all individuals who are guilty develop physiological changes. These changes can occur from nervousness, fear, and emotional distress when taking a polygraph test.
The present study investigated such physiological change (EDA) through the implementation of GKT. The detection of concealed information was based upon orienting or defensive responding. The researchers showed a pattern of consistent elevated EDA responses provoked by “guilty knowledge” questions. Larger EDA responses to questions containing cheating details compared to baseline measurements were examined. The findings suggest the subjects recognized details regarding cheating on a