context: Four individuals sign up for a psychological research study only to discover that they are now subjects of a brutal, modern version of the Project MKULTRA indoctrination program.[2] One by one, the subjects are brought into a large, white room, in which the tables and chairs have been bolted to the floor.
  They are each given a questionnaire to fill out. In the meantime, a researcher enters the room, ostensibly to give an overview of the study. He indicates to the subjectsâthree men and a womanâthat the study will take approximately eight hours to complete, at which time they will each be paid $250. Upon completing his introduction, the researcher shoots the female subject in the head with a gun and promptly leaves the room.
  Over the next few hours, the remaining three male subjects will be subjected to additional physical and psychological brutality. Only one subject will survive the ordeal. This subject manages to escape into the building. The loudspeaker gives details of where the subject is in the building. It is then realized that the subject is going where he is supposed to be. He ends up in a room with two other males tied to their chairs. The loudspeaker then states that phase 2 is to begin.
  It is revealed, during the last subject's escape attempt, that the goal of the covert program is to achieve in human civilians a phenomenon similar to apoptosis in cells (a comparison noted in the film), by developing "civilian weapons" akin to suicide bombers.
question: Four volunteers sign up for a study, but it actually turns out to be what?
answer: Classified government psychological program