ou've probably heard people talk about "defense mechanisms," or ways that we protect ourselves from things that we don't want to think about or deal with. The term got its start in psychoanalytic therapy, but it has slowly worked its way into everyday language. Think of the last time you referred to someone as being "in denial" or accused someone of "rationalizing." Both of these examples refer to a type of defense mechanism.
In Sigmund Freud's topographical model of personality, the ego is the aspect of personality that deals with reality. While doing this, the ego also has to cope with the conflicting demands of the id and the superego. The id seeks to fulfill all wants, needs and impulses while the superego tries to get the ego to act in an idealistic and moral manner.
What happens when the ego cannot deal with the demands of our desires, the constraints of reality and our own moral standards? According to Freud, anxiety is an unpleasant inner state that people seek to avoid. Anxiety acts as a signal to the ego that things are not going right.
Frued identified three types of anxiety: 1. Neurotic anxiety is the unconscious worry that we will lose control of the id's urges, resulting in punishment for inappropriate behavior.

2. Reality anxiety is fear of real-world events. The cause of this anxiety is usually easily identified. For example, a person might fear receiving a dog bite when they are near a menacing dog. The most common way of reducing this anxiety is to avoid the threatening object.

3. Moral anxiety involves a fear of violating our own moral principles.
In order to deal with this anxiety, Freud believed that defense mechanisms helped shield the ego from the conflicts created by the id, superego and reality.

Defense Mechanisms

Because of anxiety provoking demands created by the id, superego and reality, the ego has developed a number of defense mechanisms to cope with anxiety. Although we may knowingly use these mechanisms, in many cases these defenses work unconsciously to distort reality.
While all defense mechanisms can be unhealthy, they can also be adaptive and allow us to function normally. The greatest problems arise when defense mechanisms are overused in order to avoid dealing with problems. In psychoanalytic therapy, the goal may be to help the client uncover these unconscious defense mechanisms and find better, more healthy ways of coping with anxiety and distress.
Researchers have described a wide variety of different defense mechanisms. Sigmund Freud's daughter, Anna Freud described ten different defense mechanisms used by the ego.
Follow the links below to read more about each type of defense mechanism as well as other defense mechanisms described by psychologists.

Denial

Denial is probably one of the best known defense mechanisms, used often to describe situations in which people seem unable to face reality or admit an obvious truth (i.e. "He's in denial."). Denial is an outright refusal to admit or recognize that something has occurred or is currently occurring. Drug addicts or alcoholics often deny that they have a problem, while victims of traumatic events may deny that the event ever occurred.
Denial functions to protect the ego from things that the individual cannot cope with. While this may save us from anxiety or pain, denial also requires a substantial investment of energy. Because of this, other defenses are also used to keep these unacceptable feelings from consciousness.

Repression

Repression is another well-known defense mechanism. Repression acts to keep information out of conscious awareness. However, these memories don't just disappear; they continue to influence our behavior. For example, a person who has repressed memories of abuse suffered as a child may later have difficulty forming relationships.
Sometimes we do this consciously by forcing the unwanted information out of our awareness, which is known as