PROCEDURE: Relatively small size, 20 adult M, ave 28 year olds, Double blind, parts randomly allocatd to one of two conditions - Condition 1: Didn't know if they were getting scopolamine or placebo, Condition 2: Injected with scopolamine or a placebo. fMRI scan on their brains whilst playing the "arena task" (complete vr game in which the researchers are, researchers observing how well the participants are able to create spatial memories) Goal of the game to navigate around an arena to reach a pole. When learned where pole is, vr goes blank for 20 seconds. Participants asked to actively rehearse how to get to the pole in the arena. When screen reappeared, were in the new area and had to work their way back to the pole.
Procedure repeated 3-4 weeks later, with other injection