Andrew Huberman· PhD
the first is the artificial nature of the study they weren't designing it to test the hypothesis but they had individuals in bed for 14 hours relative to a standard 8 hour period and sure enough what they found was that when you force people night after night to be in bed for 14 hours somewhere after about 6 or 7 hours they wake up and then you can't get out of bed in the study so you just lie awake and then at some point I don't know if it's through boredom or you drift back off into sleep and that was argued as a clear demonstration of this split sleep but as I said they're awake usually for about six and a half seven hours also there was no magical Awakening period it's a probability distribution and what that means is if you look at the data it's just more likely that people will wake up after about 6 or seven hours and they're more likely that they will go back down into sleep it wasn't as though the whole experiment demonstrated a very clear termination of sleep that everyone had at that moment in time so that's the first issue um and the second issue which is first issue it's kind of an abnormal thing 14 hours forced in bed the second is it wasn't a clear separation it's just simply higher probability the final issue is that it was a study done in only seven individuals healthy males and so I have yet to see it you know scaled up