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A defence mechanism is a coping technique that reduces anxiety arising from unacceptable or potentially harmful impulses. Defence mechanisms are unconscious and are not to be confused with conscious coping strategies. Sigmund Freud was one of the first proponents of this construct.〔("Freud Theories and Concepts (Topics) ) AROPA. 2013. Retrieved on 05 October 2013〕 Defence mechanisms may result in healthy or unhealthy consequences depending on the circumstances and frequency with which the mechanism is used.〔(Utah Psych. "Defense Mechanisms" ) 2010. Retrieved on 05 October 2013.〕 In psychoanalytic theory, defence mechanisms ((ドイツ語:Abwehrmechanismen)) are psychological strategies brought into play by the unconscious mind to manipulate, deny, or distort reality in order to defend against feelings of anxiety and unacceptable impulses to maintain one's self-schema. These processes that manipulate, deny, or distort reality may include the following: repression, or the burying of a painful feeling or thought from one's awareness even though it may resurface in a symbolic form;〔 identification, incorporating an object or thought into oneself;〔Chalquist, Craig. ("A Glossary of Freudian Terms" ) 2001. Retrieved on 05 October 2013.〕 and rationalization, the justification of one's behavior and motivations by substituting "good" acceptable reasons for the motivations.〔 Generally, repression is considered the basis for other defence mechanisms.〔 Healthy persons normally use different defences throughout life. An ego defence mechanism becomes pathological only when its persistent use leads to maladaptive behaviour such that the physical or mental health of the individual is adversely affected. The purpose of ego defence mechanisms is to protect the mind/self/ego from anxiety and/or social sanctions and/or to provide a refuge from a situation with which one cannot currently cope.〔(【引用サイトリンク】title=defence mechanisms -- Britannica Online Encyclopedia )〕 One resource used to evaluate these mechanisms is the ''Defense Style Questionnaire'' (DSQ-40). == Structural model: Id, ego, and superego == The concept of id impulses comes from Sigmund Freud’s structural model. According to this theory, id impulses are based on the pleasure principle: instant gratification of one's own desires and needs. Sigmund Freud believed that the id represents biological instinctual impulses in humans, such as aggression (Thanatos or the Death instinct) and sexuality (Eros or the Life instinct). For example, when the id impulses (e.g., desire to have sexual relations with a stranger) conflict with the superego (e.g., belief in societal conventions of not having sex with unknown persons), unsatisfied feelings of anxiousness or feelings of anxiety come to the surface. To reduce these unpleasant feelings, the ego might use defence mechanisms (conscious or unconscious blockage of the id impulses). Freud believed that conflicts between these two structures resulted in conflicts associated with psychosexual stages. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「defence mechanisms」の詳細全文を読む スポンサード リンク
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