In straightforward, non-technical language, Colin Robson describes how to design, carry out, analyze and interpret simple psychological experiments. He shows ways of finding the statistical test appropriate to the problem, the reasoning behind the choice and how to present the results as simply and clearly as possible. As well as acquiring a range of useful statistical skills, the psychology student is encouraged to develop a general understanding of the experimental approach. This extensively revised and updated edition takes into account the changing role and position of experimentation within psychology and includes a more critical approach to the virtues and usefulness of such methods.