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The higher education sector plays an important role in a nation’s implementation of pro-environmental regulations. Environmental initiatives should be the focal point of a university's mission, and they are expected to be present in everyday academic life on campus. This study aims to propose the extended model of the theory of planned behavior (TPB) to understand the psychological aspects that may enhance the likelihood of university students engaging in environmentally friendly behavior.

This study used a quantitative approach involving a national sample of university student participants (N = 1,608) from various regions across Indonesia. The battery included extended TPB dimension measures (attitudes, norms, behavior control, environmental concern and habits on pro-environmental behavior intention) that were administered in the Indonesian language.

The structural equation modeling analysis revealed that the proposed extended TPB model met fit model indices and significantly predicted participants’ pro-environmental intentions.

This theoretical model has the potential to assist relevant stakeholders and higher education institutions in the development of evidence-based pro-environmental policies and interventions to promote sustainable student behavior.

This study presents a novel approach to understanding the effect of the extended TPB model on participants’ ecological intentions in the Indonesian university setting. This study was among the first to propose a sustainable behavior intention model based on the TPB theory within the Indonesian context. The current findings challenged the established TPB framework and offered fresh insights into the behavioral-psychological interplay within university environmental contexts.