Four corners is about forming an opinion and making a choice. It is a good way of beginning or depening a discussion and the method can be used with large groups. Even shy persons can express their attitudes without feeling exposed.
The facilitator presents four alternatives and identifies each of them with one of the room’s four corners. The participants then go to the corner that is closest to their present opinion. When everyone has chosen a corner, all those in the same corner spend some minutes telling each other why they made that choice. A couple of people from each corner then tell the other ‘corners’ how they argued. The facilitator encourages people to move to another corner if the discussion causes them to change their opinion.
Construct the four alternatives so that none of them seem to be the right or the wrong one. Make sure one of the alternatives is open-ended.
See also the application Democracy’s two faces