<span lang="IN">Classical assessments that are not comprehensive and do not distinguish students' initial abilities make measurement results far from the actual abilities. This study was conducted to produce a computerized adaptive test for physics critical thinking skills (CAT-PhysCriTS) that met the feasibility criteria.</span><span> The test was presented for the physics subject of 11^th</span><span lang="IN"> g</span><span>rade high school students with two-tier multiple-choice format.</span><span lang="IN"> This development research was based on the 4-D model combined with the test development model by Oriondo &amp; Antonio. Eleven experts and 577 11^th grade high school students in Kulonprogo, Indonesia, have participated. The media feasibility and the content validity of the items was assessed by experts, while item and abilities parameters were estimated by item response theory. The results obtained: 1) CAT media was declared very feasible and content validity of 136 items was declared valid; 2) all items fitted to partial credit model, the item reliability was classified as good, and the difficulty index of items was good; 3) the results of the CAT-PhysCriTS were equivalent to students academic achievement. Based on the results, CAT-PhysCriTS has fulfilled the requirements as a measuring instrument with measurement times were faster and more comprehensive for large-scale assessments.</span>

This research was conducted to design the physics test instrument based on local wisdom "Gasing" used in measuring the cognitive skill of the 11th-grade senior high school students and to analyze the content validity. The question format of the test is two-tier multiple-choice. The first tier consists of 5 answer choices and the second tier consists of 5 choices of answer reasons. A methodological study was conducted to examine the content validity of the physics test instrument through a twostep process (design and judgment). The design stage was conducted through five-steps, including determining the objectives, selecting the appropriate item format, preparing the table of specifications, writing the test items, and editing the test items. At the expert's judgment stage was to analyze the content validity obtained from the assessment of six validators (3 lecturers and 3 physics teachers) using the Aiken's formula. Based on the results of the research showed that the highest content validity value was one and the content validity index of 32 items was above 0.78. Thus, the physics test instrument based on local wisdom "Gasing" that developed was valid and feasible in terms of the validity of its contents.