http://encyclopedia.stateuniversity.com/pages/21428/submarin...
http://en.wikipedia.org/wiki/John_Ross_%28Arctic_explorer%29
An excellent book about this is: "Barrow's Boys: A Stirring Story of Daring, Fortitude, and Outright Lunacy"
http://www.amazon.com/Barrows-Boys-Stirring-Fortitude-Outrig...
"The factors under study encompass physiological functions, immunity, fitness, and plasma cortisol levels to evaluate stress and adaptation; group structure, dynamics, communications and psychological resilience; monitoring of microbial ecology in the hermetic, confined quarters; the effect of dietary supplements on performance and mood, and many more."
I'm sure they'll learn a thing or two about how to make the journey more comfortable for when it eventually happens.
I'm sure this experiment is to find adequate methods to stave off cabin fever. Simple things like altering the lighting is known to reduce problems by causing changes in shadows, etc.
Having an international crew for an expedition like this is likely to be helpful (if you're not hiring xenophobes) as it allows a greater variety of discussion. I'm British and living in Canada, and you wouldn't believe how much you have to talk about with complete strangers compared with someone of your own nationality. Add people in with differing skill sets and different language skills and you give people a vast amount to discuss before topics run out.
I'm a little surprised to see that none of their crew have actual space experience.
Maybe it'd be better. If we want to send large numbers of people to Mars for mining or colonization eventually, picking a more random group of people might be preferable. I dunno.
I wonder if this is really a good idea. Clearly it won't be an option on the real mission.
A better simulation would be to dump them on some remote artic ice sheet where they actually can't get back. Or on the moon :)
Edit: in terms of psychological data, I'd imagine that the long flights of some cosmonauts on Mir were a better case study.