2、知觉对比 知觉对比（ contrast） 知觉对比（perceptual contrast）是指两种具有相对属 性的刺激同时或相继出现，知觉体验差异明显的现象。 性的刺激同时或相继出现，知觉体验差异明显的现象。
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因此，在不改变基本视力的前提下，通过某种提高对比度知觉的方式训练大脑有可能改善CSF。
Thus, it's possible to improve CSF without changing basic aspects of vision by training the brain in a way that heightens awareness of contrast.
对强度律、对比律、组合律、协同律、差异律、经验律、活动律等知觉规律在中学数学教学中的应用作了详尽的论述；
Second, it deals with many laws applied in teaching . like strength law, contrast law, combination law, conjuction law, experience law, activity law in details.
婴儿期言语知觉研究表明婴儿最初（1~4个月）可以分辨几乎所有的语音范畴对比；
Researches about speech perception in infancy indicate 1-4-month-old infants can discriminate most phonetic category contrast, including native category contrasts and nonnative category contrasts.
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