本文中涉及试题的难度系数的概念,这里给大家作一个简单的说明.试题的难度系数反映试题的难易程度,难度系数越小,表示试题的难度越高.一般地,整套试题要有梯度,因此各题的难度系数应有所不同,这是命制试题时要加以特别考虑的.整份试卷的平均难度系数最好掌握在0.5左右,难度系数大于0.7和小于0.3的试题不能太多. This article involves the difficulty of the test question concept, here for everyone to make a simple explanation.The difficulty of the test item reflects the degree of difficulty of the test item, the difficulty coefficient is smaller, the higher the difficulty of the test questions .Generally, the whole set of questions should have a gradient , So the difficulty coefficient of the questions should be different, this is the life-time questions to be given special consideration.The average difficulty of the entire paper is best controlled at 0.5 or so, the difficulty coefficient is greater than 0.7 and less than 0.3 of the questions can not be too much .