No clue.
Look at this thing:
http://einsteinianroulette.wikia.com/wiki/Cthunkan#AttributesThe table that says "Stat Levels" are your physical stats. So if, for example, you're using an amp or resisting alien influences, then your physical body's "Mind" stat (which is currently at +1) will determine how tired you will get or how well you will resist those influences. You get 5 points for those stats per levelup and decide where to put them collectively (or through mental conflict, if you can't reach an agreement).
The tables with your character's names on them are your mental skills. The mental skill of whoever is controlling the body apply to any actions you take. So if Thaddeus is in control and shooting a gun, he will do much better than if Duncan were in control, because his conventional skill is so much better. You get 10 points for those skills per levelup and decide on which skill and on which character to put them collectively (or through mental conflict, if you can't reach an agreement).
Now, whenever there is a mental conflict, the skill named "Will" in your table becomes relevant. So if, for example, The Chief and Thaddeus are having a disagreement about what the body should do and they both roll 5 on their will roll, then Thaddeus will win that disagreement, because he has higher "Will".
So if someone was able to roll well and overpower the others and put all 10 points in his will, he would become much more capable of taking control from the others, probably leading to more will for him on the next levelup, but probably also rendering the other minds less cooperative and less likely to listen to him willingly.
Did Yancy give up his MCP or is this a mistake?
http://einsteinianroulette.wikia.com/wiki/Yancy_Hargraves?diff=10530Because going on a mission naked, while no doubt honouring his Scottish heritage, will probably get him killed.