“…Open-ended test questions can stimulate essential aspects of critical thinking like analyzing, rethinking, or generating new ideas (Franco, Costa, and Almeida, 2018;Franco et al, 2018;Tiruneh et al, 2017;Asmawati et al, 2018) Third, measure rationality answer. Critical thinking means someone has a reasonable explanation (Mahbubah et al, 2018;Negoro et al, 2020;Istiyono et al, 2019;Abidin, Istiyono, Fadilah, and Dwandaru, 2019). Reasonable means the ability to think that tries to connect known facts into a conclusion ( Ennis, 1996;Sutarno et al, 2019;Abidin, Istiyono, Fadilah, and Dwandaru, 2019).…”