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考试是检测教学质量的重要手段。命题的质量直接关系到检测的信度和效度。然而在实际教学中,却存在不容忽视的命题随意性。 现以某校小学毕业考试数学试题为例:一道选择题是:“用一根42厘米长的铁丝正好可以焊成长6厘米、宽4厘米的长方体教具,它的高为( )厘米。”给的否案有4个:“(1)4 (2)3 (3)5 (4)2”,参考答案是“(2)”。经计算正确答案应为0.5厘米。另一题“一个圆柱形水池直径是20厘米、深2米,在池内
Examination is an important measure of teaching quality. The quality of the proposition is directly related to the reliability and validity of the test. However, in practical teaching, there is a randomness of propositions that can not be ignored. Now take a school primary school mathematics exam questions as an example: a multiple choice question is: “With a 42 cm long wire just can be welded into a 6 cm long, 4 cm wide rectangular teaching aids, its height is () cm.” To There are 4 no case: “(1) 4 (2) 3 (3) 5 (4) 2”, the reference answer is “(2)”. After calculating the correct answer should be 0.5 cm. Another question "A cylindrical pool diameter is 20 cm, 2 meters deep, in the pool