The design and implementation of a diagnostic test system based on the enhanced S-P model
Deng‐Jyi Chen, Ah‐Fur Lai, I-Chang Liu · 2005
The cognitive diagnostic test can be used to understand the learning effects (such as strengths and weaknesses) of learners for a specific subject area. Based on the evaluation results of the diagnostic test, instructors may suggest or give students additional material on the subject area for students who do not meet the requirements. The S-P (Stu-dent-Problem) model has been used for this purpose for a long time. However, the cur-rent S-P model pays little attention to a student’s response time for each test item or for the entire question set during the test. The student’s response time for each test item can be an important factor for instructors wanting to diagnose each student’s individual abil-ity in problem solving. Also, there are few computerized diagnostic test analysis systems available that are designed to support both text-diagram-based and/or multimedia-based presentation test items. In this research, we incorporate the response time, difficulty index, and discrimina-tory index of each test item into an S-P model during the analysis. Specifically, we em-ploy two terms: 1) the nimbleness of thinking of a student, which can be measured based on the response time for answering each test item, and 2) the problem solving ability of a