An intervention, which used elements of the theory of planned behavior, was developed and tested in a randomized control trial (RCT) involving households in the city of London, Ontario, Canada. A bespoke methodology involving the direct collection and measurement of food waste within curbside garbage samples of control (n = 58) and treatment households (n = 54) was used to evaluate the effectiveness of the intervention. A comparison of garbage samples before and after the intervention revealed that total food waste in treatment households decreased by 31% after the intervention and the decrease was significantly greater (p = .02) than for control households. Similarly, avoidable food waste decreased by 30% in treatment households and was also significantly greater (p = .05) than for control households. Key determinants of treatment household avoidable food waste reduction included personal attitudes, perceived behavioral control, the number of people in a household, and the amount of garbage set out.

中文翻译：

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“减少食物浪费，省钱”：测试减少家庭食物浪费的新型干预措施

在加拿大安大略省伦敦市的一项随机对照试验 (RCT) 中开发并测试了一项使用计划行为理论要素的干预措施。一种定制的方法涉及直接收集和测量控制（n = 58）和处理家庭（n = 54）的路边垃圾样本中的食物垃圾，用于评估干预的有效性。干预前后垃圾样本的比较显示，干预后处理家庭的食物垃圾总量减少了 31%，且减少量显着大于对照组 (p = .02)。同样，处理家庭可避免的食物浪费减少了 30%，并且也显着高于对照组（p = 0.05）。