Southern Regional Research Center, USDA ARS, 6400 Perkins Road, Baton Rouge, LA 70808, USA.
Appetite. 2010 Jun;54(3):465-72. doi: 10.1016/j.appet.2010.01.012. Epub 2010 Jan 29.
This paper describes the development and evaluation of the WillTry instrument, a psychometric tool designed to measure children's willingness to try fruits and vegetables. WillTry surveys were interviewer-administered to 284 children in an elementary school and summer day camps located in rural Mississippi and Arkansas (United States) communities. Factor analysis was used to determine construct dimensionality. Additional evaluation included internal consistency, test-retest reliability, and predictive validity. Factor analysis suggested a single dimension for the food items. The WillTry food scale had substantial reliability (intraclass correlation coefficients between 0.61 and 0.80) and sufficient internal consistency (Cronbach's alpha > or = 0.70). Results of the regression analysis for percent consumption of foods offered on WillTry response confirmed the predictive validity of the instrument. The results of these analyses provide psychometric evidence for the use of the WillTry instrument as a measure of willingness to try fruits and vegetables in rural, southern US children 5-14 years of age.
本文介绍了 WillTry 工具的开发和评估，这是一种旨在衡量儿童尝试水果和蔬菜意愿的心理计量工具。WillTry 调查通过访谈的方式对美国密西西比州和阿肯色州农村社区的 284 名小学生和夏令营儿童进行了调查。采用因子分析来确定结构的维度。进一步的评估包括内部一致性、重测信度和预测效度。因子分析表明食物项目具有单一维度。WillTry 食物量表具有较高的可靠性（食物摄入量百分比的组内相关系数在 0.61 到 0.80 之间）和足够的内部一致性（Cronbach's alpha >或= 0.70）。WillTry 反应中提供的食物百分比的回归分析结果证实了该工具的预测效度。这些分析结果为在 5-14 岁的美国南部农村儿童中使用 WillTry 工具作为衡量尝试水果和蔬菜意愿的指标提供了心理计量学证据。
