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首页> 外文期刊>American Journal of Epidemiology >Construct Validation of 4 Food-Environment Assessment Methods: Adapting a Multitrait-Multimethod Matrix Approach for Environmental Measures
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Construct Validation of 4 Food-Environment Assessment Methods: Adapting a Multitrait-Multimethod Matrix Approach for Environmental Measures

机译：构建4种食品环境评估方法的验证：采用多特征多方法矩阵方法进行环境措施

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摘要

Few studies have assessed the construct validity of measures of neighborhood food environment, which remains a major challenge in accurately assessing food access. In this study, we adapted a psychometric tool to examine the construct validity of 4 such measures for 3 constructs. We used 4 food-environment measures to collect objective data from 422 Ontario, Canada, food stores in 2010. Residents' perceptions of their neighborhood food environment were collected from 2,397 households between 2009 and 2010. Objective and perceptual data were aggregated within buffer zones around respondents' homes (at 250 m, 500 m, 1,000 m, and 1,500 m). We constructed multitrait-multimethod matrices for each scale to examine construct validity for the constructs of food availability, food quality, and food affordability. Convergent validity between objective measures decreased with increasing geographic scale. Convergent validity between objective and subjective measures increased with increasing geographic scale. High discriminant validity coefficients existed between food availability and food quality, indicating that these two constructs may not be distinct in this setting. We conclude that the construct validity of food environment measures varies over geographic scales, which has implications for research, policy, and practice.
机译：很少有研究评估邻里食物环境措施的结构有效性，这仍然是准确评估食物获取途径的主要挑战。在这项研究中，我们采用了一种心理测量工具来检查3种结构的4种此类测量的结构有效性。我们采用了4种食品环境措施，收集了2010年加拿大安大略省422家食品店的客观数据。在2009年至2010年之间，我们从2,397户家庭中收集了居民对其邻里食品环境的看法。客观数据和感知数据汇总在周围的缓冲区内受访者的房屋（分别为250 m，500 m，1,000 m和1,500 m）。我们为每个量表构建了多特征-多方法矩阵，以检验构建结构对食品可得性，食品质量和食品可承受性的有效性。目标度量之间的收敛效度随着地理范围的增加而降低。主观测度和主观测度之间的收敛效度随着地理规模的增加而增加。可获得的食物和食物的质量之间存在较高的判别效度系数，表明这两种结构在这种情况下可能并不相同。我们得出结论，食品环境措施的构造效度在地理范围内有所不同，这对研究，政策和实践都有影响。

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