Pledges counteract the boomerang effect in a sustainable showering intervention for children

Abstract Water scarcity has become a growing concern due to climate change. As fresh water is going to become increasingly scarce in the future, inculcating water-conserving habits among young children is very important. We conduct a randomized field experiment that focussed on instilling the behavi...

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Main Authors: Jeeva Somasundaram, Zhiyu Wang
Format: Article
Language:English
Published: Nature Portfolio 2025-07-01
Series:Communications Psychology
Online Access:https://doi.org/10.1038/s44271-025-00294-7
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author Jeeva Somasundaram
Zhiyu Wang
author_facet Jeeva Somasundaram
Zhiyu Wang
author_sort Jeeva Somasundaram
collection DOAJ
description Abstract Water scarcity has become a growing concern due to climate change. As fresh water is going to become increasingly scarce in the future, inculcating water-conserving habits among young children is very important. We conduct a randomized field experiment that focussed on instilling the behaviour of showering within 5 min among primary school children (N = 1121) in Singapore. Alongside an educational show emphasizing the importance of a 5 min shower, we introduced two commitment interventions—private and public (written) pledges—to nudge children to adhere to the 5 min shower time goal. Unexpectedly, the educational show and the 5 min shower time goal had an undesirable boomerang effect: children with a baseline shower time above 5 min reduced their shower time, while those below 5 min increased it, resulting in no net reduction. The private and public pledge-based commitments effectively countered the boomerang effect, reducing overall shower time and increasing adherence to the 5 min target. The commitment interventions achieved this by increasing the participants’ willingness to meet the target and by ensuring greater reductions for those more willing to reduce shower time.
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spelling doaj-art-5d797956db0341eaad203ee5c9f86e1f2025-08-20T03:46:29ZengNature PortfolioCommunications Psychology2731-91212025-07-01311810.1038/s44271-025-00294-7Pledges counteract the boomerang effect in a sustainable showering intervention for childrenJeeva Somasundaram0Zhiyu Wang1IE Business School, IE UniversitySynapxeAbstract Water scarcity has become a growing concern due to climate change. As fresh water is going to become increasingly scarce in the future, inculcating water-conserving habits among young children is very important. We conduct a randomized field experiment that focussed on instilling the behaviour of showering within 5 min among primary school children (N = 1121) in Singapore. Alongside an educational show emphasizing the importance of a 5 min shower, we introduced two commitment interventions—private and public (written) pledges—to nudge children to adhere to the 5 min shower time goal. Unexpectedly, the educational show and the 5 min shower time goal had an undesirable boomerang effect: children with a baseline shower time above 5 min reduced their shower time, while those below 5 min increased it, resulting in no net reduction. The private and public pledge-based commitments effectively countered the boomerang effect, reducing overall shower time and increasing adherence to the 5 min target. The commitment interventions achieved this by increasing the participants’ willingness to meet the target and by ensuring greater reductions for those more willing to reduce shower time.https://doi.org/10.1038/s44271-025-00294-7
spellingShingle Jeeva Somasundaram
Zhiyu Wang
Pledges counteract the boomerang effect in a sustainable showering intervention for children
Communications Psychology
title Pledges counteract the boomerang effect in a sustainable showering intervention for children
title_full Pledges counteract the boomerang effect in a sustainable showering intervention for children
title_fullStr Pledges counteract the boomerang effect in a sustainable showering intervention for children
title_full_unstemmed Pledges counteract the boomerang effect in a sustainable showering intervention for children
title_short Pledges counteract the boomerang effect in a sustainable showering intervention for children
title_sort pledges counteract the boomerang effect in a sustainable showering intervention for children
url https://doi.org/10.1038/s44271-025-00294-7
work_keys_str_mv AT jeevasomasundaram pledgescounteracttheboomerangeffectinasustainableshoweringinterventionforchildren
AT zhiyuwang pledgescounteracttheboomerangeffectinasustainableshoweringinterventionforchildren