The role of positive emotion in anorexia nervosa (AN) has been underappreciated in both theory and treatment. Yet, people with AN demonstrate high motivation for and sustained effort toward weight loss, achieving success to an extreme beyond the capability of most people. Positive emotion dysregulation may facilitate and reinforce such efforts. The positive emotion amplification (PE-AMP) model of AN describes a dynamic interplay between biologically based enhanced reward responding and cognitive-behavioral factors that amplify positive emotion, resulting in positive feedback cycles that motivate and reinforce weight loss behavior during the AN onset phase. These experiences subvert the pursuit of happiness by providing artificial senses of autonomy, competency, and relatedness to others (self-determination theory; Ryan & Deci, 2000) that provide a stark contrast to an otherwise negative emotional environment, resulting in the emergence and persistence of AN psychopathology as a self-sustaining sense of purpose. Ultimately, negative emotion, PE dysregulation, and artificial self-determination threats continue to drive AN behavior during the AN maintenance phase, pushing patients toward a genuine self-determination breakdown that can lead to hospitalization, health crises, relational strife and diminished quality of life, or even manifest in suicidal behavior. Future research directions and novel methodological approaches inspired by the PE-AMP model are discussed, as are important treatment implications for addressing this highly treatment-resistant disorder. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

中文翻译：

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神经性厌食症的积极情绪和动机动力学：积极情绪放大模型（PE-AMP）。

积极情绪在神经性厌食症 (AN) 中的作用在理论和治疗上都未得到充分重视。然而，患有 AN 的人对减肥表现出强烈的动机和持续的努力，取得了超出大多数人能力的极端成功。积极的情绪失调可能会促进和加强这种努力。AN 的积极情绪放大 (PE-AMP) 模型描述了基于生物学的增强奖赏反应与放大积极情绪的认知行为因素之间的动态相互作用，导致积极反馈循环，在 AN 发作阶段激励和强化减肥行为。这些体验通过提供人为的自主感、能力感和与他人的关联感来颠覆对幸福的追求（自决理论；Ryan & Deci，2000) 与原本消极的情绪环境形成鲜明对比，导致 AN 精神病理学作为一种自我维持的目的感的出现和持续存在。最终，负面情绪、PE 失调和人为的自决威胁继续推动 AN 维持阶段的 AN 行为，将患者推向真正的自决崩溃，从而导致住院、健康危机、关系冲突和生活质量下降，甚至表现为自杀行为。讨论了受 PE-AMP 模型启发的未来研究方向和新方法，以及解决这种高度难治性疾病的重要治疗意义。（PsycInfo 数据库记录 (c) 2020 APA，保留所有权利）。