[Hinrik]

It's more about the small effect sizes of 8 people vs 1. Still a lot of room for noise in the result.

[cestith]

True, but where's a better study at the moment? I think it would be easier to gather more studies and do a cross-study meta analysis rather than recruiting a million people into a single study to eliminate the effects of noise.

The "27 times" is factually their finding in one study, which someone might read as being given too much weight in the article but doesn't change the data.