In psychology, frustration is a common emotional response to opposition. Related to anger and disappointment, it arises from the perceived resistance to the fulfillment of individual will. The greater the obstruction, and the greater the will, the more the frustration is likely to be. Causes of frustration may be internal or external. In people, internal frustration may arise from challenges in fulfilling personal goals and desires, instinctual drives and needs, or dealing with perceived deficiencies, such as a lack of confidence or fear of social situations. Conflict can also be an internal source of frustration; when one has competing goals that interfere with one another, it can create cognitive dissonance. External causes of frustration involve conditions outside an individual, such as a blocked road or a difficult task. While coping with frustration, some individuals may engage in passive–aggressive behavior, making it difficult to identify the original cause(s) of their frustration, as the responses are indirect. A more direct, and common response, is a propensity towards aggression.
To the individual experiencing anger, the emotion is usually attributed to external factors that are beyond one's control. Although mild frustration due to internal factors is often a positive force (inspiring motivation), it is more often than not a perceived uncontrolled problem that instigates more severe, and perhaps pathological anger. An individual suffering from pathological anger will often feel powerless to change the situation they are in, leading to and, if left uncontrolled, further anger.
Some people are predisposed towards feelings of frustration, indexed in terms of temperament (frustration) across adolescence and neuroticism in adulthood. Temperamental frustration is associated with perceptual alterations including changes in perceived relationship affection.