在时间压力下增加反应活力作为饮食障碍的跨诊断标志物
Sam Hall-McMaster1,2, Ondrej Zika1,3,4,5
1Max Planck Institute for Human Development, Germany.
Computational psychiatry (Cambridge, Mass.)
|August 18, 2025
概括
患有亚临床饮食障碍 (ED) 症状的个体没有表现出改变的决策持久性. 然而,他们表现出增加的运动活力,特别是在时间限制附近,这表明这可能是ED倾向的跨诊断标记.
科学领域:
- 心理学 心理学 心理学
- 神经科学是一个神经科学.
- 临床心理学 临床心理学
背景情况:
- 饮食障碍 (ED) 涉及对食物和体重的强烈担忧,影响决策,并导致持续的行为,尽管奖励减少.
- 改变决策,特别是利用-探索平衡的转变,被假设为EDs这些持久行为的基础.
研究的目的:
- 为了调查患有亚临床ED症状的个体是否由于决策过程的改变而表现出增加的行为持久性.
- 与健康对照人群相比,研究患有亚临床ED症状的个体的决策门和利用-探索平衡.
主要方法:
- 在亚临床ED组 (sED; N=44) 和健康对照组 (HC; N=56) 中,用于测量行为持久性和决策值的食任务.
- 行为持续性是通过利用选项所花费的时间来量化,而决策值则是通过切换选项时的反事实奖励来量化.
主要成果:
- 与预测相反,在sED和HC组之间没有发现持久性或决策值的显著差异.
- 探索性分析显示,随着区块时间限制的临近,sED组的响应时间逐渐加快.
- 这种运动活力的增加与诊断类别的饮食障碍症状的严重程度相关.
结论:
- 该研究没有发现改变决策值或增加亚临床ED症状持续性的证据.
- 增加的运动活力,特别是在时间压力下,成为潜在的超诊断标志物,用于饮食障碍倾向.
- 对运动活力的进一步研究可以为EDs的神经生物学基础提供新的见解.
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