该考试是依据Varun在麻省所学的原理来评估试题难度。
Called the AMCAT, it draws on theories Varun studied at the Massachusetts Institute of Technology, which helps him assess the difficulty of questions.
过去几年的研究表明参加新托业考试的考生并没有感觉试题难度增加。
Studies conducted over the last few years confirm that candidates who take the new TOEIC test do not find it more difficult than the current test.
提出一个统计模型，用于检验试题库中由专家给出试题难度这一指标的准确性。
The statistical model is put forward to test the accuracy of item difficulty indexes in the test papers given by the educational experts.
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