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I wonder what the impact of knowing you can leave at any time is... Well, short of imprisoning them I guess this is the closest we can get to simulating the experience.

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I suspect the ability to leave at any time was a requirement of institutional review boards (IRBs) and consent laws (false imprisonment, anyone?).

Perhaps a way to do it and remove the ability to leave would be to send them to the International Space Station for an extended period ... (still cheaper than a trip to Mars!)

I suspect that even the ISS would still pose some significant logistical hurdles for such a long experiment involving so many people. I don't know anything about the physical setup of the on-Earth "shuttle", but I would hope it is larger than the crew quarters onboard the ISS (for sanity's sake).

The trade-off, I guess, is that the simulation becomes more real when one incorporates the very real dangers of space.

I imagine knowing that you could leave would be very helpful. It's empowering to have that control in a situation & then to choose to stay - versus being unable to leave. I think it would be easier to fall into screwy thinking & hate what you've chosen when you literally have no choice in the matter.

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