The huge amount of food wasted at the consumer or household level has severe environmental and economic consequences. In the present work, we compared two self-report measures for the assessment of food waste quantities at the household level in Switzerland. Participants (N = 223) were asked to complete an online food waste questionnaire (FWQ), in which they were instructed to report the average amount of food waste produced in their households. In the second step, participants were asked to maintain a food waste diary (FWD) for 21 days. They were instructed to write down all food waste items, including their relative amounts, as well as the reason and method for their disposal. Using correlation and regression analyses, we found that the amount of food waste reported on the FWQ and in the FWD were highly correlated, revealing similar patterns in terms of their psychological predictors. In the context of the range of different methods available for the assessment of household food waste, our study has provided valuable insights into two of the most used self-report measures. Similarities between and limitations of the methods have also been discussed. This knowledge can be used to contextualise the available results, to design future studies, and ultimately, to help develop intervention strategies to reduce household food waste.

在消费者或家庭一级浪费的大量食物对环境和经济造成严重后果。在目前的工作中，我们比较了两种自我报告方法，用于评估瑞士家庭层面的食物垃圾量。参加人数 = 223）被要求填写在线食物浪费调查表（FWQ），指示他们报告其家庭中产生的食物浪费的平均数量。在第二步中，要求参与者保持21天的食物垃圾日记（FWD）。他们被指示写下所有食物垃圾，包括它们的相对数量，以及处理的理由和方法。使用相关性和回归分析，我们发现在FWQ和FWD上报告的食物垃圾数量高度相关，在心理预测因素方面揭示出相似的模式。在评估家庭食物垃圾的各种不同方法的背景下，我们的研究提供了对两种最常用的自我报告措施的宝贵见解。还讨论了方法之间的相似性和局限性。这些知识可用于将可用结果与实际情况相结合，设计未来的研究，并最终帮助制定减少家庭食物浪费的干预策略。