Collections of Web Pages
Statistical Methods for Psychology
This website is intended to support Statistical Methods in Psychology, 8th edition by David C. Howell. (If you are using the 6th or 7th edition, simply change the URLs by changing "methods8" to "methods6" or "methods7" in the address bar.) The website is intended to serve a number of functions. It will provide data that you can use for examples and exercises, answers to exercises (some of them), and other material that you may find useful. In addition, I have tried to incorporate important material on topics that I don't discuss in the text, and helpful hints about where to find useful information on the web.
You can find the web site at Methods Book Link
Fundamental Statistics for the Behavioral Sciences
This website supports Fundamental Statistics for the Behavioral Sciences, 8th edition by David C. Howell, was published in 2013. These pages are intended to provide data that are referenced in examples and exercises, answers to exercises (some of them), a set of Java applets that illustrate concepts in the book, guides to the use of SPSS and two freely downloadable packages that do much of what SPSS will do. I also have other material that you may find useful. In addition, I have tried to incorporate important material on topics that I don't discuss in the text, and hints about where to find useful information on the web.
You can find the web site at Fundamentals Book Link
Additional Material on Many Topics
Over the years I have written many pages on a variety of statistical topics. The material referred to
here is generally not discussed in depth in either of my books, but is material that is certainly useful.
Some of this material is in draft form, and it may be revised from time to
time. Please remember where you found it, and always give credit if you use it. I
would appreciate suggestions for further additions and/or clarification.
A page listing each of the topics covered can be found at this link. S ee also the pages related to the Methods text under the heading of "Supplementary Material.
Randomization Tests and Bootstrapping
Most discussions of statistical tests concern parametric tests, where we attempt to draw conclusions about the parameters of the pooulation(s) from which the data were draw. Another, very important, set of procedures are often known as "resampling procedures," which include randomization tests and bootstrapping. I cover those extensively in a large set of pages. The pages begin here.
Randomization tests differ from parametric tests in almost every respect.
Even more than parametric tests, randomization tests emphasize the importance of random assignment of participants to treatments.
There are many more important Internet sites related to statistical analyses than anyone can reasonably list. I have picked out some of my favorites, but an Internet search will find you many more. To find my favorite sites, click here. If you have any good ones to suggest, please let me know.