Three theories were used to support group correction: the theory of Bruffee's collaborative learning, the theory of Piagets constructivism, and the theory of Carl R.
三个理论被用来支持作者的观点，即合作学习理论，建构主义学习理论和罗杰斯的人文主义个性心理学理论。
2
Three characteristics of brain information processing are summarized: selective, adaptable and cooperative, and neural-group. Selective theory including these characteristics is addressed.
总结脑信息处理的三个特性：选择性、适应性及协同性，并论述了涵盖此三个特性的神经元群选择理论。
3
Under the circumstances that do not have the aid of grouptheory, we give three direct ways to calculate the rotation matrix.