Distinguishing Pro- and Harmful-Environmental Behaviours: The Roles of Motivation, Stages of Change, Basic Psychological Needs, and Nature Relatedness

Abstract

The degradation of the environment and climate change represent some of the most important environmental issues affecting our society today, and we need to better understand what can be done in order to mitigate the negative effects of human activity on the environment. The present program of research proposes to examine, through three studies, how the frequency of pro-environmental behaviours (PEB) and harmful-environmental behaviours (HEB) are related to self-determined (SDM) and non-self-determined motivation (NSDM), stages of change (SOC), the satisfaction versus the frustration of basic psychological needs as defined by Self-Determination Theory, and nature relatedness. In Study 1 (N = 377), a scale was created to measure two distinct types of environmental behaviours, PEB and HEB, and the relationships between these types of environmental behaviours and SDM and NSDM were examined. Results demonstrated that both types of behaviours loaded on two distinct factors when conducting an exploratory factor analysis, that they were associated differently with environmental motivation, and that levels of motivation were different according to the reported frequency of adoption of PEB and HEB. In Study 2a (N = 266) and 2b (N = 529), the role of stages of change (SOC) was introduced to determine whether environmental motivation and behaviours were different across SOC and to examine whether SOC played a mediating or moderating role in the relationship between environmental motivation and behaviours. Results indicated that people in the later SOC displayed higher levels of SDM and PEB while people in the earlier stages reported higher levels of NSDM and HEB. It was also observed that SOC partially mediated the relationship between environmental motivation and behaviours. In Study 3 (N = 507) nature relatedness was compared to the satisfaction and frustration of basic psychological needs proposed by SDT to examine their respective roles in the association of motivation, SOC, PEB and HEB. Results revealed that nature relatedness was incremental to need satisfaction and frustration with regard to levels of SDM. Also, nature relatedness was an important determinant of SOC and both types of environmental behaviours. As for the proposed model, it was demonstrated that high levels of nature relatedness were associated with higher PEB and lower HEB through partial mediation by SDM and SOC, while need frustration was linked to a higher reported frequency of HEB through mediation by NSDM. Overall this thesis expands on SDT research by highlighting the importance of including HEB in conjunction with PEB and by demonstrating the prominent roles that SOC and nature relatedness could play in the motivational process associated with environmental action.