Mindful Waste Segregation Through Self-Administration of “Watching Eyes”

Waste segregation in private households remains difficult to encourage, particularly in urban environments where anonymity reduces social monitoring. This study tested a behavioral nudge intervention using stickers of “watching eyes” that can be attached to kitchen waste bins and outdoor containers, designed to remind occupants to separate organic waste from general trash. As evidenced by weighing of the collection trucks showed that the intervention produced a measurable effect, resulting in a 5-8% increase in biowaste collected, indicating that subtle visual cues can positively influence household waste behaviors. However, the findings also revealed unintended consequences: While the accompanying survey showed ceiling effects on most items describing waste segregation habits, some residents reported discomfort and protest, perceiving the intervention as surveillance or control. These results highlight both the promise and the risks of using social cues to encourage pro-environmental behavior. While low-cost and easy to implement, such interventions need careful consideration of psychological responses to avoid backfiring effects and to ensure sustainable, socially acceptable improvements in waste segregation practices. unknown