This document provides an overview of frustration, conflict, and defense mechanisms from a psychology lecture for nursing students. It defines frustration as a negative feeling when one is prevented from reaching a goal and identifies three sources of frustration. It defines conflict as a type of frustration and describes four types of conflicts: approach-approach, avoidance-avoidance, approach-avoidance, and multiple approach-avoidance. It then outlines simple, violent, and task-oriented reactions to frustration and methods for nurses to cope with frustration and conflict, including identifying sources and changing or accepting situations. Finally, it defines and provides examples of both successful and unsuccessful defense mechanisms.