The study is built on the norm activation model, a well-established framework in environmental psychology that explains how prosocial and pro-environmental behavior emerges from a chain of psychological events. In its classic form, the model proposes that when individuals become aware of the negative consequences of not acting, and when they ascribe responsibility for those consequences to themselves, a personal moral norm is activated. This activated personal norm then drives behavioral intention. The model has been applied successfully to energy conservation, recycling, and green purchasing in many contexts, but it has rarely been tested in developing regions, where waste management infrastructure and cultural norms differ markedly from the wealthy countries where most of this research has historically been conducted.

Hidalgo-Crespo extends the model in a significant way. Beyond the core chain of awareness of consequences, ascription of responsibility, and personal norms, the study incorporates environmental consciousness as an upstream driver and adds subjective norms, the perceived social expectations of important others, drawn from the theory of reasoned action tradition. The extended model then predicts two distinct outcome variables: intentions to recycle and intentions toward green consumerism, meaning the willingness to purchase environmentally friendly products. By treating these two behaviors separately rather than lumping them together as a single pro-environmental intention, the study acknowledges that recycling a bottle and choosing a green product are psychologically different acts, shaped by different contextual pressures and different kinds of motivation.

The empirical foundation of the work is a cross-sectional survey of 1,198 respondents in Guayas Province, a coastal region of Ecuador that includes the country’s largest city, Guayaquil. Participants completed instruments measuring the Big Five personality traits, which are openness, conscientiousness, extraversion, agreeableness, and neuroticism, along with the constructs of the extended norm activation model and the two intention measures. The data were analyzed using partial least squares structural equation modeling, or PLS-SEM, a technique well suited to complex models with multiple constructs and pathways. To explore personality-based differences, the researcher applied cluster analysis, a statistical method that groups individuals according to their profiles across the five traits, and then used multigroup analysis to test whether the structural relationships in the model differed significantly between the resulting personality clusters.

The headline result is that personal norms and subjective norms emerge as significant predictors of both recycling intentions and green consumerism intentions. In other words, people intend to reduce waste when they feel a moral obligation to do so and when they perceive that the people around them expect such behavior. This dual pathway is important because it suggests that internal moral activation and external social expectation operate in parallel, each contributing independently to the intention to act. Environmental consciousness, meanwhile, was found to feed positively into awareness of consequences and ascription of responsibility, confirming its role as an upstream factor that primes the moral chain of the norm activation model. People who are more consciously attuned to environmental issues are more likely to recognize the harms of waste and to accept personal responsibility for preventing them.

Yet the most novel contribution of the study lies in what the multigroup analysis revealed. The strength and coherence of these normative pathways varied across the personality clusters identified in the sample. This means that the psychological mechanism linking, say, awareness of consequences to a personal norm, or a personal norm to a recycling intention, does not operate with the same force in everyone. For some personality profiles, the moral chain of the norm activation model appears tightly coupled, so that recognizing a problem reliably produces a sense of duty and then an intention to act. For others, the links are weaker or structured differently, revealing heterogeneous psychological mechanisms underlying what looks, from the outside, like the same pro-environmental attitude. Personality, in this framing, is not merely another predictor to add to a regression equation but a lens that refracts the entire motivational process.

The study also uncovered an asymmetry between the two behavioral outcomes. Recycling intentions appeared more strongly associated with contextual and situational factors than green consumerism intentions did. This makes intuitive sense once one considers the mechanics of the two behaviors. Recycling depends heavily on infrastructure: whether collection points exist, whether sorting systems are convenient, and whether the immediate environment makes the behavior easy or difficult. Green consumerism, by contrast, is a market-based choice that may be driven more by internal values and norms, since purchasing decisions are made within stores and online spaces where social and situational pressures differ. For waste policy in developing regions, this distinction matters, because investments in recycling infrastructure may yield returns that no amount of moral persuasion can match for that specific behavior.

The setting of the research gives these findings particular weight. Developing regions remain underrepresented in environmental psychology research, even as they confront rapidly growing waste streams and face some of the sharpest consequences of unsustainable consumption. Ecuador, like many Latin American countries, has been expanding recycling programs and environmental education initiatives, but the effectiveness of such programs depends on understanding what actually motivates citizens. By grounding the analysis in a large sample from Guayas Province, the study offers evidence that the theoretical machinery developed largely in Europe and North America can be meaningfully applied elsewhere, but only with careful attention to how personality and context reshape the motivational pathways in local populations.

The practical implications reach directly into the design of environmental communication campaigns. If personality clusters moderate the normative pathways to intention, then interventions could be tailored rather than universalized. A campaign emphasizing personal responsibility for consequences might resonate strongly with one cluster, while a campaign highlighting the expectations of family and community, thereby activating subjective norms, might work better for another. Personality-informed segmentation, long a staple of commercial marketing, could become a tool of environmental policy, allowing governments and NGOs to allocate their communication budgets more efficiently and to avoid the frustration of campaigns that consistently fail to move particular segments of the public. The study suggests that such differentiated strategies may support more effective waste reduction overall.

The research, which received no external funding and was conducted in accordance with internationally accepted ethical standards including written informed consent from all participants, ultimately delivers a message that extends well beyond waste management. Human behavior is the decisive variable in nearly every environmental challenge, from plastic pollution to climate change, and the models used to predict that behavior are increasingly sophisticated. This study pushes that sophistication one step further by insisting that the predictors themselves, the moral norms and social expectations that drive action, are filtered through stable individual differences in personality. Sustainability science, the findings imply, must come to terms with psychological heterogeneity, not as noise in the data, but as a fundamental feature of the human systems it seeks to change. In the effort to build greener societies, knowing who people are may be just as important as knowing what they believe.

Subject of Research: Psychosocial determinants of waste reduction intentions, including the norm activation model and Big Five personality effects, in Ecuador

Article Title: An extended norm activation model of waste reduction intentions with personality cluster effects

Article References: An extended norm activation model of waste reduction intentions with personality cluster effects. (n.d.). https://doi.org/10.1007/s43621-026-04624-5

Image Credits: AI Generated

DOI: 10.1007/s43621-026-04624-5

Keywords: waste reduction, norm activation model, recycling intentions, green consumerism, Big Five personality traits, cluster analysis, PLS-SEM, environmental psychology, Ecuador, subjective norms, personal norms, sustainable behavior