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Titolo
The Pinocchio effect and the Cold Stress Test: Lies and thermography
Autor(es)
Soggetto
Cold Stress Test
Detection of deception
Pinocchio effect
Thermography
Clasificación UNESCO
61 Psicología
Fecha de publicación
2017
Resumen
[EN]We applied the use of thermography to cognitive neuropsychology, particularly as an
objective marker of subjective experiences, in the context of lying. We conducted
three experiments: (a) An important lie was invented by the participants in 3 min,
and it was recounted by phone to a significant person while they were recorded by
the thermographic camera, obtaining a face and hands map of the lie. (b) A similar
methodology was carried out, but adding the Cold Stress Test (CST) of the dominant
hand during the phone call, obtaining a second physiologic marker (the percentage of
thermal recovery) to detect the lie. Further, it established a control condition where it
generated anxiety in the participants using IAPS images with negative valence and
high arousal, which were described by phone to a loved one. We obtained results
that showed significant correlations between changes in body temperature and mental
set. Of particular interest was the temperature of the nose and hand, which tended to
decrease during lying (Experiment 1). The participants also showed a lower recovery
of the temperature after the CST when they were lying (Experiment 2). (c) Experi ment 3 is a replication of Experiment 2 but with a different type of lie (a more
ecological task) in a different scenario (following the ACID interview, with the use
of the phone eliminated and participants motivated to lie well). The main pattern of
results was replicated. We obtained an accuracy of 85% in detection of deception
with 25% of false alarms.
URI
ISSN
0048-5772
DOI
10.1111/psyp.12956
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