Most notably used by Sigmund Freud in his psychoanalytic theory, a defense mechanism is a tactic developed by the ego to protect against anxiety. Defense mechanisms are thought to safeguard the mind against feelings and thoughts that are too difficult for the conscious mind to cope with. In some instances, defense mechanisms are thought to keep inappropriate or unwanted thoughts and impulses from entering the conscious mind.
For example, if you are faced with a particularly unpleasant task, your mind may choose to forget your responsibility in order to avoid the dreaded assignment. In addition to forgetting, other defense mechanisms include rationalization, denial, repression, projection, rejection and reaction formation.
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