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23rd October 2017
10:15am BST

Rogers explained how the machine was picking up on slight signals like "one side of the lip pulled back slightly, the eyes squinting a little. It's kind of a tightening around the eyes, and a little bit of raising of the corners of the lips — but not into a smile."
To establish a base, researchers had the machine search and assess a series of genuinely expressionless faces. Those expressions registered at around 97 percent neutrality.
The remaining three percent included ‘little blips of emotion’ – but nothing significant.
The team then entered celebrity faces most commonly associated with resting bitch face into the machine reader – we’re looking at you Kristen Stewart and Victoria Beckham – to show the level of emotion on their faces.
The result showed more than double the emotion score registered on the face – which was commonly associated with a look of contempt or anger.
So what does this mean about those scowl faces?
Chances are they’re not angry – they just can’t hide their emotions.