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| audio_captcha [2010/01/28 11:23] – nishimotz | audio_captcha [2010/01/28 11:45] – nishimotz | ||
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| Within the CAPTCHA tasks, the difference of recognition performance between human and machine can be used as a criterion of the safeness. | Within the CAPTCHA tasks, the difference of recognition performance between human and machine can be used as a criterion of the safeness. | ||
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| + | Viewied from another side, mental workload for human in listening audio CAPTCHA tasks has not been investigated very much. | ||
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