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Liars get warm noses

10.12.2012

When a person lies, he experiences the "Pinocchio effect" - the temperature of his nose, as well as the muscles in the inner corner of his eyes, rises. In addition, our facial temperature rises if we think hard or experience anxiety. These are just some of the findings from a groundbreaking study carried out at the Department of Experimental Psychology at the University of Granada, which is looking for new applications for thermography.

Thermography is a technique based on measurements of body temperature. It is used in many areas - in industry, medicine, etc. Thermographic cameras have a wide range of applications. With their help, for example, respiratory diseases in cattle or rabies in raccoons are determined. Thermography is used to detect casting defects in metallurgical plants. It was developed during the Second World War to detect the enemy using night vision devices.

The University of Granada, and in particular the scientists Emilio Gomez Milan and Elvira Salazar Lopez, are pioneers in the application of thermography in the field of psychology. The results they have recently obtained are innovative in nature, and simply curious. For example, thermography can detect sexual arousal in men and women. Another curious fact is that performing complex tasks, participating in interrogation and lying cause a change in facial temperature.

The temperature around the nose and at the corners of the eyes is regulated by a brain element called the insula. And it is activated only when we experience real feelings (the so-called "qualias"). The more active, real emotions, the lower the temperature, and the lie raises the temperature.

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