【独家发布】The ‘ability’ scale in item characteristic curve theory

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For the six available sets of empirical data, the discrimination (slope) parameter of the logistic item characteristic curve was found to have a signifmant positive correlation over items with the difficulty (location) parameter. This unpleasant situation can be eliminated by a suitably chosen transformation of the ability scale. An example of the transformation is given and some empirical results of using the transformed scale are shown.


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关键词：Character Ability Theory scale curve ability

谢谢分享。

晓七 发表于 2016-7-27 14:52
谢谢分享。

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