test of 24 items was conducted to measure the latent variables verbal and non-verbal aggression in school children (age 6 to 12), in which 12 items measure verbal aggression and 12 items measure non-verbal aggression. We expect that the correlation between the latent variables is at least 35. We administer the test in a sample of 500 children and investigate the correlations using confirmatory factor analysis. In this analysis: some factor loadings are fixed to zero and oblique factor rotation will be used some factor loadings are fixed to zero and the correlation between the factors will be estimated some factor loadings are fixed to be equal to each other and the correlation between the factors will be fixed to 35 some factor loadings will be estimated and oblique factor rotation will be used