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From those data points, the device calculates your heart rate, which is used to estimate how much time you are spending in various parts of the sleep cycle.

Instead they studied dozens of data points, observing everything from the children's speech and language development to their frequency of healthcare to their performance at school.

I thought we’d still be thinking about it up until the night of the Oscars, but in retrospect it’s just another data point in the most chaotic Oscars season I can remember.

“I think it’s too early to celebrate,” he said, adding that more data points are needed.

"To have even one data point of a real example would be incredibly powerful," says Prof Gareth Collins from Imperial College London.