Increasingly, researchers are focusing on the study of environmental values of young people. Indeed, it is today's youth who will be the decision makers in the future. Attention has turned to explaining individual differences in this construct, and many authors have illustrated gender differences. The current study (N = 1,285, 10-to 12-year-olds) compares results of a classical analytical approach to quantifying such differences (independent samples t tests) with one of measurement and structural invariance across genders. The essential difference between the two is that whereas the latter controls for differential item functioning across gender, the first does not. The results show that whereas gender differences in utilization values occur when applying a classic analytical approach, they do not occur through the invariance approach. These results suggest that other studies that demonstrated gender differences might be explained by differential item functioning rather than reflect genuine differences, and might thus represent methodological artifacts.
Keywords environmental values, children, 2-MEV, invariance, gender differences
Environmental Values (EVs)Within the fields of environmental education, psychology, and sociology, EVs have been studied extensively. The term EV attempts to describe how
Article 374Environment and Behavior 46(3) people view the natural environment and their relationship to it. Social psychologists regard this as the endorsement of a fundamental paradigm, and the term mainly taps into what, in social psychology, are called "primitive beliefs" (Stern, Dietz, & Guagnano, 1995) about the nature of the earth and humanity's relationship with it. These primitive beliefs form the inner center of an individual's belief system and represent that individual's basic truths about physical and social reality (Rockeach, 1968).Within the framework of the two-dimensional model of EVs (2-MEV; Bogner & Wiseman, 2006), the term values stems from a convention established by Rockeach (1968) that indicates a set of closely related attitudes. Thus, first-order factors are labeled attitudes, and higher order factors are labeled values. The first results with regard to the development and application of the 2-MEV were published in the mid-90s (Bogner & Wilhelm, 1996), and through several follow-up studies, the scale was refined (e.g., Bogner & Wiseman, 2002). The item battery used in the scale initially quantified five distinct environmental attitudes via first-order factors ("intent of support," "care with resources," "enjoyment of nature," "altering nature," and "human dominance"), but the emphasis in the research using the 2-MEV has moved to values via two higher order factors (Bogner & Wiseman, 2006;Oerke & Bogner, 2010). This two-factor model was formalized as follows:Environmental values are determined by one's position on two orthogonal dimensions, a biocentric dimensions that reflects conservation and the protection of the environment (Preservation or P); and an anthropocentric dimension that reflects t...