ELICITATION – Obtaining information without revealing the intent or exceptional interest of the questioner, through a verbal or written exchange with a subject who may or may not be willing to provide it if he knew the true purpose.

CONTROL – The capacity to cause or change certain types of human behavior by implying or using physical or psychological means to induce compliance. Compliance may be voluntary or involuntary.

Control can rarely be established without control of the environment. By controlling the subject’s physical environment, we will be able to control his psychological state of mind.