Reduce Food Waste, Save Money: Testing a Novel Intervention to Reduce Household Food Waste

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.

Automated summary

A study conducted in households in London, Ontario, Canada, implemented an intervention based on the theory of planned behavior. The results showed a significant decrease in food waste in treatment households compared to control households, with reductions of 31% for total food waste and 30% for avoidable food waste. Factors influencing the reduction of avoidable food waste in treatment households included personal attitudes, perceived behavioral control, household size, and amount of garbage set out.