Pearson Carolyn M, Smith Gregory T
Department of Psychology, University of Kentucky.
J Abnorm Psychol. 2015 Nov;124(4):1003-13. doi: 10.1037/abn0000111.
To investigate whether there are different patterns of development for binge eating and purging behavior among preadolescent and early adolescent girls, we conducted trajectory analyses of those behaviors in 938 girls across 8 waves of data from the spring of 5th grade (the last year of elementary school) through the spring of 9th grade (the first year of high school). Analyses revealed 4 separate developmental trajectories for binge eating behavior (labeled none, increasing, decreasing, and high steady) and 3 separate developmental trajectories for purging behavior (labeled none, dabble, and increasing). Fifth grade scores on risk factors that were both transdiagnostic (negative affect and negative urgency) and eating disorder specific (expectancies for reinforcement from eating and from thinness) differentiated among the trajectory groups, in some cases before the groups differed in the target behaviors. These findings are the first, to our knowledge, to examine developmental trajectories for bulimic symptom onset in youth as young as elementary school. Clinical implications are discussed.
为了调查青春期前和青春期早期女孩暴饮暴食和清除行为是否存在不同的发展模式，我们对938名女孩在从五年级春季（小学最后一年）到九年级春季（高中第一年）的8次数据收集过程中的这些行为进行了轨迹分析。分析揭示了暴饮暴食行为的4种不同发展轨迹（分别标记为无、增加、减少和高稳定）以及清除行为的3种不同发展轨迹（分别标记为无、偶尔进行和增加）。五年级时，在跨诊断风险因素（消极情绪和消极紧迫感）以及饮食失调特异性风险因素（对饮食和消瘦强化的预期）方面的得分在各轨迹组之间存在差异，在某些情况下，这些差异出现在各轨迹组在目标行为上出现差异之前。据我们所知，这些发现首次对小学阶段的青少年暴食症状发作的发展轨迹进行了研究。文中还讨论了其临床意义。
