University Psychiatric Center KU Leuven, Campus Kortenberg, Belgium.
Eat Behav. 2013 Aug;14(3):263-8. doi: 10.1016/j.eatbeh.2013.03.004. Epub 2013 Mar 22.
Differences in affective variability in eating disorders are examined using an ecological momentary assessment (EMA) protocol. It is hypothesized that restriction serves to pre-empt the activation of affect whereas bulimic behavior serves to cope with overwhelming affect once activated. Therefore, we expect anorexia nervosa (AN) patients of the restricting type (AN-RT) to have lower mean levels of affect and less affective variability than Bulimia Nervosa (BN) patients. Patients' successive affective states over time are represented as different positions in a two-dimensional space defined by the orthogonal dimensions of valence and activation. Affective variability is measured by the within person variance and the new concepts of pulse and spin. Results of this exploratory study suggest that the diagnostic groups have the same mean levels of affect but affect spins less in patients with AN-RT. Using an EMA protocol and measures like pulse and spin may reveal insights in eating disorders that remain hidden with more traditional assessment methods.
使用生态瞬时评估（EMA）方案来研究进食障碍中情感变异性的差异。据推测，限制行为可以预先阻止情感的激活，而暴食行为则可以在情感被激活后应对强烈的情感。因此，我们预计限制型神经性厌食症（AN-RT）患者的情感平均值和情感变异性低于神经性贪食症（BN）患者。患者在时间上的连续情感状态用效价和激活这两个正交维度定义的二维空间中的不同位置来表示。情感变异性通过个体内方差和脉冲和旋转的新概念来衡量。这项探索性研究的结果表明，诊断组的情感平均值相同，但 AN-RT 患者的情感旋转幅度较小。使用 EMA 方案和像脉冲和旋转这样的测量方法可以揭示传统评估方法所隐藏的进食障碍的洞察力。
