1) As far as interviews are concerned (or any dialogue) mirroring might get you further than power -- eg: when your interviewer crosses his/her arms, you might gain an advantage doing the same - whatever the "power poses" theory says. I suppose it is like language: Short, conscience sentences might be "powerful" or "commanding" -- but that alone doesn't make for effective prose in all cases. No communication without context.
2) Sitting in a room for two minutes, relaxing, convinced that you're doing a "power poise" -- might elevate your hormone levels. I'm sure screaming a battle cry, or doing a haka would work to. Not sure if it is just the poise in itself that helps with the levels. Would be interesting to do a reverse test: tell people that a "low power" position is actually a "power position" and vice versa -- and redo the experiment. I highly doubt we've got strong evolutionary ties to sitting with our feet up on a swivel chair.
3) The point about blind athletes -- so you imply blind people don't have socialized behaviour? Thankfully you don't have to live in an isolation chamber just because you're blind.
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