It occupies a special place in social interaction and is a fascinating feature of our biology, with motor, emotional and cognitive components.

笑在社会交往中占据重要的位置，是人类生物学中一个迷人的特征，包含了运动、情绪和认知成分在内。

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He talks about many of the principles one might encounter in a study of human-computer interaction, or cognitive science.

他谈到许多人们在学习人工计算机或者感知科学时可能遇到的规则。

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They found that the higher their level of social interaction, the better their cognitive functioning.

他们发现，社会交往越多的人认知表现越好。

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Having the back and forth interaction between a parent and a child from birth builds communication and cognitive skills from the beginning.

WHITEHOUSE: Educating Children at Critical Crossroads