Data analysis
In this study Chi-square was used to check the homogeneity of samples as well as the consistency of contributing demographic factors in the research.To check the normality of the data, Skewness and Kurtosis (In interval 2, -2) were calculated. Also, the ANCOVA was performed considering some of assumption, for example: The dependent variable and covariate were continues. Independent variable was consist of two categorical (experimental and control groups).There was no relationship between the observation in each group and between groups themselves. There was different participant in each group with no participant being in more than one group. There was homogeneity of variances (by using of Levine’s test) and there were no outliers among the research data.Analysis of Covariance (ANCOVA) was utilized to compare the mean scores between the groups by adjusting for pretest effects. The level of statistical significance was set to be lower than 0.05. SPSS16 was used to analyze of collected data (pre-test) and to determine the effect of intervention 2 months after the educational intervention.