Listening test

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other hand, it might also mean that the lights in the television Studio are too hot- which is 
one reason polygraph tests are inadmissible in court. “Good lie detectors don’t rely on a 
single sign,” says Ekman, “but interpret clusters of verbal and non-verbal clues that suggest 
someone might be lying.” 
Those clues are written all over the face. Because the musculature of the face is directly 
connected to the areas of the brain that processes emotion, the countenance can be a 
window to the soul. Neurological studies even suggest that genuine emotions travel 
different pathways through the brain than insincere ones. If a patient paralyzed by stroke 
on one side of the face, for example, is asked to smile deliberately, only the mobile side of 
the mouth is raised. But tell that same person a funny joke, and the patient breaks into a 
full and spontaneous smile. Very few people -most notably, actors and politicians- are able 
to consciously control all of their facial expressions. Lies can often be caught when the liar’s 
true feelings briefly leak through the mask of deception. We don’t think before we feel, 
Ekman says. “Expressions tend to show up on the face before we’re even conscious of 
experiencing an emotion.” 
One of the most difficult facial expressions to fake- or conceal, if it’s genuinely felt – is 
sadness. When someone is truly sad, the forehead wrinkles with grief and the inner corners 
of the eyebrows are pulled up. Fewer than 15% of the people Ekman tested were able to 
produce this eyebrow movement voluntarily. By contrast, the lowering of the eyebrows 
associated with an angry scowl can be replicated at will but almost everybody. “If someone 
claims they are sad and the inner corners of their eyebrows don’t go up, Ekman says, the 
sadness is probably false.”