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This study aims to measure the value of the validity and reliability of state defense attitudes and insight into the history of high school students by not giving treatment to the subject to be studied. This research is an ex post facto type. This study uses a quantitative approach, because the information obtained is presented in the form of numbers and analyzed using statistical analysis. This research was carried out in all Yogyakarta State Senior High Schools. The results of this study indicate that: (1) assessment instruments to measure state defense and historical insight have validity coefficients of 1.00 and 1.00, which means that all instrument items developed are in a very useful category to use. (2) based on the results of empirical trials of state defense attitudes and historical insights, the INFIT values of MNSQ and INFIT t can be seen, the value of INFIT MNSQ defends the state by 1.00 with a standard deviation of 0.09, while the historical insight is 1.00 with standard deviation 0.10. The value of INFIT t defends the state of -.0.22 with the standard deviation of 2.17 while the historical insight is 0.09 with standard decision 1.86. (3) The reliability value obtained for the state defense attitude is 0.83 and 0.97

Validity And Reliability Of State Attitudes And Historical Insights Of High School Students