<![CDATA[The research aims to develop the objective physics instrument test based Higher Order Thinking skills (HOTS) that already meet the qualification in aspects of validity, reliability, distinguishing power, difficulty level, and effectiveness of detractors. The type of research that is used in research is Research and Development (R & D), the Borg & Gall models which consists of 7 stages, namely : 1) Research and information collecting, 2) Planning, 3) Development preliminary of products, 4) Preliminary field testing, 5) main product revision, 6) Main Field Test, and 7) Main product revision. Subject of research is student class X in SMA Swasta St. Lusia Sei Rotan who totaled 10 people on the preliminary field testing and student class X in SMA Swasta St.Lusia Sei Rotan and SMA N 2 Percut Sei Tuan who totaled 50 people on the main field testing. Results of the study showed that the validation of the contents by expet judgment is valid with the average value is 87.6 and has been getting evidence empirically through validation construction item test with the average value is 3.9 ( tcalculate > ttable , ttable = 2.01), the reliability of item test is 0.87 with high category ( 𑟠≥0,70 ), the distinguishing power have the average value is 0.45 with a category well, the average difficulty level is rather difficult with the range value is 0.2-0.73, and the effectiveness of distractors were function, so that instrument test decent used to measure higher order thinking skills of student.]]>
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