The present study drew on the act-frequency approach to study eating disturbances by modifying the items of the Eating Expectancy Inventory (EEI) and Thinness and Restricting Expectancy Inventory (TREI) to their frequency versions, namely, EEI-F and TREI-F. In Study 1, a total of 354 young females completed the EEI-F and TREI-F for factor analysis. In Study 2, to assess for construct validity and predictive utility, an independent sample of 241 young females completed a test battery including the EEI-F, TREI-F, and measures of eating disturbances. In Study 1, results from an exploratory factor analysis indicated a one-factor solution for both EEI-F and TREI-F that account for 65.65% and 72.97% of the common variance, respectively. In Study 2, both measures were found to possess good test-retest reliability (11-week) in a subset sample of participants from Study 1. Moreover, in support for construct validity, we found both EEI-F and TREI-F scores were positively associated with scores on measures of eating disturbances (i.e., drive for thinness, bulimic symptoms). Finally, in support of utility, frequency of eating and thinness expectancies predicted eating disturbances above and beyond general attitudes associated with eating and thinness expectancies (measured by the EEI and TREI). Overall, the present findings provide promising evidence for the validity, reliability, and utility of the EEI-F and TREI-F as reliable, valid, and useful measures of frequency of eating and thinness expectancies in young females. Implications for the theory and clinical assessments were discussed.

本研究采用行为频率方法，通过将饮食期望量表（EEI）和瘦身和限制期望量表（TREI）的项目更改为频率版本，即EEI-F和TREI-F，来研究饮食失调。在研究1中，共有354位年轻女性完成了EEI-F和TREI-F的因子分析。在研究2中，为了评估构建体的有效性和预测效用，一个独立的241名年轻女性样本完成了一个测试电池，包括EEI-F，TRII-F和饮食失调的测量。在研究1中，探索性因素分析的结果表明EEI-F和TREI-F的单因素解决方案分别占共同方差的65.65％和72.97％。在研究2中，在研究1的一部分参与者样本中，发现这两种方法都具有良好的重测信度（11周）。此外，为了支持构建效度，我们发现EEI-F和TREI-F得分均与得分呈正相关关于饮食失调的措施（例如，导致瘦弱，暴食症状）。最后，为了支持效用，进食频率和瘦身期望值预测的进食障碍超出与进食和瘦身期望值相关的一般态度（由EEI和TREI衡量）。总的来说，本研究结果为EEI-F和TREI-F作为年轻女性进食频率和瘦身期望的可靠，有效和有用的量度提供了有力的证据，证明了EEI-F和TREI-F的有效性，可靠性和实用性。讨论了对理论和临床评估的意义。