Meta- Analysis of Studies in Relationship between Environmental Knowledge and Environmental Behavior in Iran

In the present century, environmental behavior of human as the most important effective factor on environment is under the observation of sociologists. The behavior both effects environmental issues and threats and is influenced by variant factors. This study observed the relation between environmental knowledge and environmental behavior by meta- analysis approach. Since 23 studies between the years, 1390 to 1398 in the subject of environmental behavior, which were qualified, were selected for entering to meta- analysis research. The selected studies are done by survey method and applied survey tools in different statistical societies by reliable measurement. In first step, the selected studies were evaluated by homogeneity of hypothesis and publication bias. According to this, the finding indicated the homogeneity of effect size and absence of publication bias. In second step, by applying the second version of CMA software, the coefficient of effect size were evaluated. The Results have shown have shown that the effect size or coefficient of effect of environmental knowledge on environmental behavior is 0.223 which is average according to Kohen interpretation system. In addition, the results obtained the moderator role of population society variable indicated that the environmental knowledge has the most affection on environmental behavior of students.