Two-Tier Test : Development of Critical Thinking Skills in Ecosystem Concepts Helda Dumayanti, Risda Putri Indriani, Evita Nury Hariyanti, Rizhal Hendi Ristanto, Mieke Miarsyah
Universitas Negeri Jakarta
Abstract
The development of this two-tier test instrument was used to determine students critical thinking skills in the ecosystem. Students^ critical thinking includes interpretation, analysis, evaluation, inference, interpretation, and self-regulation. Critical thinking is necessary in improving the quality of education. The purpose of this research is to produce a valid and reliable two-tier test instrument to know the critical thinking ability of ecosystem materials. Research and development using a 4D development model (Define, Design, Develop, and Disseminate). The instrument was tested on two expert validators and 35 students. To test the success rate of the test, validation, reliability, and item analysis were used. The item anlaysis used is the level of difficulty of the questions and differentiating power of answer choice. Based on the results of the product trial, 10 valid questions and 5 unvalid questions. The reliability test result was 0,671 which the interpretation that 45% of respondents considered the instrument developed to be reliable. In addition, 10 questions are in the difficult category and 5 questions are in the medium category. The differentiating power of answer choice results was 1 question in the very good category, 6 questions in the good category, 4 questions in the moderate category, and 4 questions in the poor category. So that it can be concluded, the two-tier test instrument for ecosystem critical thinking in the form of multiple choice that has been developed is valid and reliable..
Keywords: Two-tier test, critical thinking, 21st century skills
