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对基于IRT的CAT计算机自适应考试系统能力估计算法中Newton-Raphson计算模型存在的收敛速度问题、无解或多解时缺少相应的估算调整策略问题进行了合理的改进,提出中值法计算模型和有关调整策略,并进行了比较分析.
The convergence rate problem of Newton-Raphson calculation model in the capacity estimation algorithm based on IRT-based CAT adaptive test system is improved, and the problem of lack of corresponding estimation adjustment strategy is solved when there is no solution or multiple solutions. The median calculation method And the adjustment strategy, and conducted a comparative analysis.