Psychologist Richard Wiseman, who wrote, “59 Seconds: Change Your Life in Under a Minute,” has developed a test to determine if you’re sleep deprived.
From Business Insider:
If you’re suffering from a lack of sleep, then you might experience very short blackouts called “micro-sleeps,” according to Wiseman. These are episodes where you involuntarily doze off for a few seconds and are not aware of what’s happening around you. (This would be a considerable nuisance at work, but could be potentially dangerous if you’re, say, driving.)
To see if you’re under-slept, Wiseman asks viewers to watch an animated clip where a scene changes after a few seconds and then flips back to the original scene. If you don’t spot certain things — like a bus switching from blue to green or disappearing buildings — then you might be sleep deprived, he says.
Watch the clip below:
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