Using pledges to improve the effectiveness of environmental information campaigns: The case of biowaste recycling

• 成果类型: Article
• 署名作者: Alonso-Pauli, Eduard; Balart, Pau; Ezquerra, Lara; Hernandez-Arenaz, Inigo
• 署名单位: Universitat de les Illes Balears; Universidad Publica de Navarra; Universidad Publica de Navarra
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-11259
• DOI: 10.1073/pnas.2414578122
• 发表日期: 2025-05-06
• 关键词: persuasive communication; field experiment; behavior-change; habit formation; COMMITMENT; metaanalysis; strategies; promises; PARTICIPATION; incentives

摘要

Through a field study (N = 1,519) that uses a technology to record real-time data on waste sorting, we find that offering the opportunity to sign a pledge increases the effectiveness of an environmental campaign. With a timespan of over four years, the pledge increased waste sorting participation by 4.55 to 5.10 percentage points (SD = 0.1997). The effect is greater immediately after the campaign (around 9 to 10 pp during the first 15 wk), but it remains sizable and statistically significant 150 to 210 wk after signing (3.11 to 4.45 pp).