关于两种Angoff法比较的模拟实验研究

采用模拟实验法比较研究了两种Angoff法——概率法和对错法——设定分数线的准确性和稳定性,结果表明:(1)当真能力低于测验的平均难度时,概率法高估分数线,而对错法低估分数线;反之,当真能力高于测验平均难度时,概率法低估,而对错法高估;(2)当真能力接近测验平均难度时,概率法比对错法更准确;反之,当真能力远高于或低于测验平均难度时,对错法更准确;(3)无论在何种实验条件下,概率法均比对错法更稳定。

A Simulation Experimental Study on the Comparison of Two Angoff Methods

In order to compare both the accuracy and stability of two Angoff methods:probability method and yes/no method,a simulation research was conducted.The research found that 1.When the true ability was less than the average test difficulty,the probability method would overestimate the passing score,while yes/no method would underestimate it;and when the true ability was greater than the average test difficulty,the probability method would underestimate the passing score,while the yes/no method would overestima...