每日科学（2010年4月8日） - 在人们学会洞穴墙壁上绘画前，动物们就学会使用生动的色彩和设计与既让动物敬畏又激励的环境来互动。

ScienceDaily (Apr. 8, 2010) — The vivid colors and designs animals use to interact with their environments have awed and inspired since before people learned to draw on the cave wall.

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每次螺旋反复都应该从一个激励人的有意义的目标开始，接着是让你不断靠近目标的互动、活动和阅读，然后是有意义的收获。

Each iteration through the spiral shouldstart with a meaningful, motivating goal, followed by theinteraction/activity/reading that moves you toward that goal, followedby a meaningful payoff.

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我们现在可以开始考虑研究社交互动方面的领域，也是通过激励和正面强化机器人来帮助人类的核心方式。

We can now start to think about domains where it's the social interaction, which is the core means by which a robot helps someone, through motivating them, or giving positive reinforcement.

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