Beck, Kent (2000). Extreme Programming Explained. Addison-Wesley. pp. 102."Under stress, people revert. They will skip writing tests. They will put off refactoring. They will avoid integrating. With your partner watching, though, chances are that even if you feel like blowing off one of these practices, your partner won't."
Williams, Laurie (2001). "Integrating Pair Programming into a Software Development Process"(PDF). 14th Conference on Software Engineering Education and Training: abstract."One of the programmers, the driver, has control of the keyboard/mouse and actively implements the program. The other programmer, the observer, continuously observes the work of the driver to identify tactical (syntactic, spelling, etc.) defects, and also thinks strategically about the direction of the work."
