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The researchers wanted to find how other emotions impact facial temperature, so they took heat-showing pictures of two groups of young heterosexual women during a standard interaction with an experimenter, which included touching the arm, palm, face and chest (using a light probe that they were told measures skin color).
When an experimenter (of either gender) touched a participant, the participant’s average skin temperature jumped about a tenth of a degree Celsius. The effect wasn’t as large when considering only touches to the participant’s arm or palm, and the skin of the face and chest regions changed the most.
This is absolutely, positively, 100% true. It is so true that it actually shocks me that an experiment had to be...