The Eating Disorder Inventory-3 (EDI-3; Garner, 2004) is a 91-item, self-report measure scored on 12 scales (three Eating Disorder Risk scales, nine Psychological scales) and six composites. A sample of 1206 female eating disorder patients was divided randomly into calibration (n = 607) and cross-validation (n = 599) samples for confirmatory factor analyses. A bifactor model best fit the data in both samples, but a model with second-order factors corresponding to the risk and psychological scales approached the fit of the bifactor model. Rasch analysis identified only two items whose level of misfit showed a lack of coherence with other scale items (the only items referring to drug and alcohol use), there were no items with reversed or “disordered” response categories, and only five items had sub-threshold estimated discrimination values. Overall, the results were supportive of the EDI-3’s psychometric properties and consistent with interpretive guidelines presented in the test manual.

饮食失调量表3（EDI-3; Garner，2004）是一项91项自我报告的量表，分为12个量表（三个饮食失调风险量表，九个心理量表）和六个综合评分表。将1206名女性饮食失调患者的样本随机分为校正（n  = 607）和交叉验证（n = 599）样本用于验证性因子分析。双因子模型最适合两个样本中的数据，但是具有与风险和心理量表相对应的二阶因子的模型接近双因子模型的拟合。Rasch分析仅确定了两个失配程度与其他量表项目缺乏一致性的项目（唯一涉及吸毒和酗酒的项目），没有反应类别颠倒或“失调”的项目，只有五个项目具有不符合项-阈值估计的歧视值。总体而言，该结果支持EDI-3的心理测量特性，并与测试手册中提供的解释性准则一致。