探讨了GIRT的2参数模型参数估计的稳健性和估计精度,并探讨了GIRT与IRT下的2参数模型估计结果的一致性.研究结果发现:在小规模评估时,GIRT的2参数模型参数估计具有较强的稳健性和较好的估计精度;与IRT框架下同类模型的估计精度相比,2个模型的估计精度相近.表明GIRT模型是一种可供选择的、可行的、有效的群体评估方法.
Investigated the robustness and estimation precision of GIRT model,and made a comparison with the outputs of IRT model.The findings displayed: under small scale assessment,the robustness of GIRT model was relatively strong,and the estimation precision was relatively great which was similar with that of IRT model.Thus GIRT model supplied another feasible group-level assessment method.