Physical Reasoning Ability Development of High School Students

This study has purpose to reveal: (1) the characteristics of physics subject test of high school students of grade X and XI, (2) the equality of vertical test of physics subject of high school students of grade X and XI, (3) the development of the ability of high school students of grade X to grade XI physics subject. The data which was in the form of scores were then processed and synchronized by using a common item non-equivalent groups design by the method of equalizing of mean and sigma based on the Rasch model. The results of this study are: (1) the validity of the physics subjects test of grade X is 0.92 and grade XI is 0.96 (2) the reliability tests is 0.928 for grade X and 0.926 for grade XI; (3) the results of the vertical equalization based on the approach of Rasch model showed the conversion equation for grade X to grade XI was b * = bx - 0.36; (4) there is a development of the ability of grade X students to grade XI students or the ability of grade XI students is higher than the ability of grade X students.