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Avolition, as a symptom of various forms of psychopathology, is the decrease in the motivation to initiate and perform self-directed purposeful activities.〔American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders, fifth edition. Arlington, VA, American Psychiatric Association〕 Such activities that appear to be neglected usually include routine activities, including hobbies, going to work and/or school, and most notably, engaging in social activities. A person experiencing avolition may stay at home for long periods of time, rather than seeking out work or peer relations. ==Psychopathology== Identified as a negative symptom of the psychotic disorder Schizophrenia by the National Institute of Mental Health (NIMH) in 2006,〔Castonguay, L., & Oltmanns, T. (2013). General Issues in Understanding and Treating Psychopathology. Psychopathology: From Science to Clinical Practice (pp. 5-6). New York: Guildford Publications.〕 avolition can be confused with other similar symptoms. Negative symptoms can be understood as the decrease or removal of an otherwise normative affective or motivational feature of cognition. Asociality, anhedonia, blunted affect, and alogia are negative symptoms frequently confused with avolition. *Asociality is the decrease in interest and motivation in forming relationships.〔 *Anhedonia is the absence of experiencing pleasure. 〔 *Blunted affect (sometimes referred to as “flat” or “restricted” affect) is the reduction in outward displays of emotional expression. 〔 *Alogia is the significant decrease or reduction in speech output. 〔 Although each negative symptom does reflect similar aspects, each needs to be differentiated properly in order to provide effective treatment. Avolition is also one of the predominant symptoms of clinical depression. It is sometimes mistaken for disinterest, anhedonia and amotivation, but is distinct. People with avolition may want to complete certain tasks but lack the ability to initiate behaviors necessary to complete them. Literally meaning "poverty of will," avolition is a restriction in the initiation of activity, including, but not limited to, goal directed behavior. In contrast, abulia (poverty of motivated behavior) - is a restriction in motivation and initiation, often characterized by an inability to set goals or make decisions. 〔Marin, R. S., & Wilkosz, P. A. (2005). Disorders of Diminished Motivation. Focus on Clinical Practice and Research, 20(4), 377-388. Retrieved from http://www.yaroslavvb.com/papers/marin-disorders.pdf〕 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「Avolition」の詳細全文を読む スポンサード リンク
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