Mason Tyler B, Hernandez Diego, Morales Jeremy C, Dunton Genevieve F
Department of Population and Public Health Sciences, University of Southern California, Los Angeles, California, USA.
Eur Eat Disord Rev. 2025 Jul 11. doi: 10.1002/erv.70010.
Impulsivity has been linked to overeating and loss of control eating (LOCE), yet most adolescent research has focused on between-subjects (i.e., trait) impulsivity; thus, less is known about how within-subjects (i.e., state) impulsivity predicts overeating and LOCE. Given this gap, this study used ecological momentary assessment (EMA) to examine the construct validity of the four-item Momentary Impulsiveness Scale (MIS) in adolescents and the relationship between within- and between-subjects impulsivity and overeating and LOCE.
Seventy-four adolescents (M = 15.68) completed a 10-day EMA protocol, reporting impulsivity (measured with the MIS) and eating behaviours multiple times daily. Generalised linear mixed models were run examining associations between baseline impulsivity measures and EMA impulsivity and impulsivity, disaggregated into within- and between-subjects effects, as a prospective predictor of overeating and LOCE.
Generally, baseline impulsivity measures predicted elevated EMA impulsivity. Also, higher within-subject impulsivity significantly predicted greater LOCE and higher between-subject impulsivity was significantly associated with greater overeating and LOCE.
Analyses demonstrated concordance between baseline and EMA impulsivity measures in adolescents and suggested that state impulsivity impacts the perceived control over eating. Adolescent preventions/interventions that provide strategies to reduce or mitigate state impulsivity warrant further investigation (e.g., providing in-the-moment self-regulatory strategies when feeling impulsive).
冲动性与暴饮暴食及失控性进食（LOCE）有关，但大多数青少年研究都集中在个体间（即特质）冲动性上；因此，关于个体内（即状态）冲动性如何预测暴饮暴食和LOCE的了解较少。鉴于这一差距，本研究采用生态瞬时评估（EMA）来检验青少年四项瞬时冲动性量表（MIS）的结构效度，以及个体内和个体间冲动性与暴饮暴食和LOCE之间的关系。
74名青少年（M = 15.68）完成了一项为期10天的EMA方案，每天多次报告冲动性（用MIS测量）和饮食行为。运行广义线性混合模型，检验基线冲动性测量与EMA冲动性之间的关联，以及作为暴饮暴食和LOCE前瞻性预测指标的冲动性，将其分解为个体内和个体间效应。
一般来说，基线冲动性测量预测了EMA冲动性的升高。此外，较高的个体内冲动性显著预测了更高的LOCE，较高的个体间冲动性与更高的暴饮暴食和LOCE显著相关。
分析表明青少年基线和EMA冲动性测量之间具有一致性，并表明状态冲动性会影响对饮食的感知控制。提供减少或减轻状态冲动性策略的青少年预防/干预措施值得进一步研究（例如，在感到冲动时提供即时自我调节策略）。
