Working mostly in Western, Educated, Industrialized, Rich, and Democratic countries, environmental psychologists have developed scales assessing relationships between pro-environmental beliefs and behaviors. Working in Tanzanian and Indonesian protected area landscapes, containing important biodiversity and conflict over human-nature interactions, we investigate the utility of the New Ecological Paradigm for measuring pro-environmental beliefs and understanding support for protected area regulations. We found the New Ecological Paradigm ineffective at measuring pro-environmental beliefs in both countries; in Tanzania due to acquiescence bias, and in Indonesia exploratory factor analysis supported none of the original factors, with 4 of 15 statements loading onto a novel “eco-fragility” factor. Individual statements in both countries and the eco-fragility factor in Indonesia were weakly correlated with support for protected area regulations, highlighting while elements of the New Ecological Paradigm can improve understanding of support for protected area regulations, care must be taken when applying psychometric tools in novel cultural contexts.