Investigating the Influence of Mental States Instruction on the Moral Judgment in the 5th Grade Female Primary Students of Hamedan

The aim of this research is toinvestigate the influence of mental states instruction on the moral judgment in the 5th grade female primary students of Hamedan. This research is a semi-experimental one with pre-test and post-test control group. The research population is all of the 5th grade female primary students in the academic year 1393-94 from which 75 students were chosen, by random cluster sampling, from Education Organization of Hamedan, Region 2, then were randomly replaced in one control group and several 15-peson groups. Learning of mental states for each tentative group was considered in 3 sessions. In this ground, control group received no training. The tool of research was moral judgment questionnaire of Sinha and Verma (1998). Data were analyzed by covariance analysis. With regard to value of chi- , the effect size is 66% which represents a strong impact of mental states learning on moral judgment increase.