The experimenting of the question bank shows that it satisfies the requirements of a psychometric model and the constructed mathematical algorithms meet the criteria for applying in computerized adaptive testing. | Developing computerized adaptive testing: An experimental research on assessing the mathematical ability of 10th graders VNU Journal of Science: Education Research, Vol. 35, No. 4 (2019) 49-63 Original Article Developing Computerized Adaptive Testing: An Experimental Research on Assessing the Mathematical Ability of 10th Graders Le Thai Hung1, Tang Thi Thuy1, Tran Lan Anh1, Nguyen Tien Dung2, Nguyen Phuong Anh2, Nguyen Thi Quynh Giang3,* 1 Faculty of Quality Management, VNU University of Education, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam 2 High school of Education Sciences, VNU University of Education, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam 3 Viettel Digital Service Corporation, 01 Giang Van Minh, Kim Ma, Ba Dinh, Hanoi, Vietnam Received 23 September 2019 Revised 12 October 2019; Accepted 28 October 2019 Abstract: Computerized Adaptive Testing (CAT) is a form of assessment test which requires fewer test questions to arrive at precise measurements of examinees' ability. One of the core technical components in building a CAT is mathematical algorithms which estimate examinees’ ability and select the most appropriate test questions for the estimation. Mathematical algorithms serve as a locomotive in operating the system of adaptive multiple-choice questions on computers. This research aims to develop essential mathematical algorithms for a computerized system of adaptive multiple-choice tests. A question bank of 500 multiple-choice questions standardized by IRT theory with the difficulty level following the normal distribution satisfying Kolmogorov- Smirnov test, to measure the mathematical ability of 10th graders is also built. The experimenting of the question bank shows that it satisfies the requirements of a psychometric model and the constructed mathematical algorithms meet the criteria for applying in computerized adaptive testing. Keywords: Computerized Adaptive Testing, ability .
