Learning in mice will be measured using the Morris Water Maze test. In this test, mice are placed in a swim tank filled with water in which powdered milk has been dissolved. The cloudiness of the water prevents the mice from seeing a platform just under the surface of the water. A mouse standing on the platform can keep its head above water. Mice prefer standing on the platform to swimming in the tank. When mice are placed in the tank, they swim around until they find the platform. The mice use visual cues to orient themselves while they are inside the tank. The visual cues can be pictures or objects which are placed around the room.