# Chapter 10: Research Design Explained

You are now at the Chapter 10 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
• Use online calculators that make doing some advanced statistical analyses simple. For example,
• if you wanted to calculate effect size from your t test , you could use this effect size calculator.
• if you had unequal variances and wanted to do Welch's t test, you could use this online calculator
Help with answering the end-of-chapter exercises.
• Use these very short tutorials to review the basics of significance testing and the basics of the t test.
• Use the authors' online t test calculator to do independent t tests and to see the effects of sample size on values (for educational use only; for actual research data, use VassarStats)
• Get a better sense of how often Type 1 errors occur, try this quick simulation.
• To learn more about Type 2 errors and how sample size affects power, try this quick simulation.
• Get a better understanding of  random assignment by going through this short (it shouldn't take you more than 10 minutes) but useful tutorial.
• Get some appreciation of how random error could make two groups differ--and how large sample sizes tend to reduce the degree to which random error will cause big differences between groups--by playing with this fun simulation.
Take some practice quizzes
• Short, general quiz
• More specific quizzes
• Take 15-item quizzes over the first part of the chapter.
• Take 11-item quizzes over the second part of the chapter.
• Take 4-item quizzes over the third part of the chapter.
• Take 9-item quizzes over the fourth part of the chapter.
• Take 10-item quizzes over the fifth part of the chapter.
• Find out how to conduct a field experiment by reading "Web Appendix: Field experiments."
• Get a better idea of the steps involved in conducting a study by reading "Web Appendix: Conducting a Study."
• If you want to write up your method section, you may wish to consult the tips on writing a method section in Chapter 15 as well as the Method section part of the checklist in Appendix A.

• If you want to write up the results of a simple experiment, you may wish to download this tutorial.
• This web page will format your t test results correctly
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