![]() ![]() Subsequently, participants were asked to simulate a “guilty” condition by performing a mock theft. While we expected no higher-than-midpoint lie-telling-ability assessments, we expected to find a standard range of self-ratings from low to high among our cohort. Relating to the possible advantages of being a good liar, people with this bias tend to highly rate their lie-telling ability. Another bias relates to the belief that the ability to lie successfully may serve one well. Moreover, those who are captured by the difficult lie and simple truth bias find it difficult to influence others to believe their lies and have been found to rate their lie-telling abilities at the midlevel and sometimes even lower. Thus, being a “poor liar” supports one’s view of oneself as basically honest. People with this bias tend to score low on self-proclaimed lie-telling ability, to sustain a positive self-image. One bias associates the ability to deliver convincing lies with dishonesty (negative quality). Self-assessed lie-telling abilities are often biased, where bias refers to a conscious or unconscious inclination that inhibits impartial judgment of the self. We discussed possible motivational explanations and implications for the Concealed Information polygraph test. These results were limited to the initial phase of the test. Under induced sad and happy moods, those who self-rated their lie-telling ability as high showed enhanced cardiovascular responsivity to critical items. Relative respiration responses to critical items obtained for the sad mood condition were more robust than the ones obtained for the happy mood condition. ![]() An induced happy or sad mood tended to lower relative skin conductance responses to critical (crime related) items and enhance relative cardiovascular responses. Participants then underwent a polygraph test and were asked to try to avoid detection. Participants were then divided into three equal groups: two groups were asked to provide a detailed written account of either a happy or sad event in order to induce a happy or sad mood, while the third group served as a neutral group. One hundred and eight undergraduate students self-assessed their lie-telling ability, committed a mock theft, and were asked to conceal information related to the crime. The present study examined the effects of mood on physiological responses in the Concealed Information polygraph Test and the relation to self-assessed lying ability. ![]()
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