This textbook offers an accessible and comprehensive introduction to statistics for all undergraduate psychology students, but particularly those in their second and third years who have already covered an initial introductory course. It covers all of the key areas in quantitative methods including sampling, significance tests, regression, and multivariate techniques and incorporates a range of exercises and problems at the end of each chapter for the student to follow.
The free CD-ROM with tutorial modules complements and enhances the exercises in the text, offers scope for distance learning, and makes both the traditional and non-traditional approaches much more accessible.
Key points of the book are: an emphasis on measurement, data summaries and graphs; a clear explanation of statistical inference using sampling distributions and confidence intervals, making significance tests much easier to understand; and help for students to understand and judge the use of particular tests in the research context beyond simple recipe following.
Chapter 10: More than Two Variables: A Peek at Multivariate Analysis
More than Two Variables: A Peek at Multivariate Analysis
Concepts for Multivariate Analysis
This chapter ‘looks forward’ into the domain of multivariate research and the statistical techniques on which it is based. We start with reasons for studying more than one thing at a time and then explore some of the issues and problems that await us when we do so. The most important issues concern how a relationship between two variables may change depending on a third variable, and how that may be interpreted in view of theoretical concepts or research questions.
At the beginning of ...