You are now at the Chapter 9 section of the book's student Web site.
Here you can
|Review and improve your understanding of the material||Quiz yourself||Apply this information||Get help|
|See how the key terms are connected by looking at this concept map.||
Test yourself on the key terms with this
Play this drag and drop matching game to see if you know your threats to internal validity.
If you have a fantasy baseball or football team, see
how knowing about regression toward the mean can help you win.
|Help with answering the end-of-chapter exercises.|
Go through an
online tutorial on internal validity
Go through our tutorial looking at the weaknesses of four designs.
|Take some practice quizzes