When do we use a paired-samples t-test?

What are the two kinds of research design in which we would use a paired-samples t-test? Be able to give/recognize examples of each.

What is counterbalancing? Why is it necessary?

For each type of design, what is the null hypothesis? What is the research hypothesis?

Be able to run a paired-samples t-test in SPSS and correctly read/interpret the output file.

When is t significant?

What does the confidence interval in SPSS tell us? Be able to report and explain this.

What is “effect size”? What are the guidelines for small, medium, and large effect size? Be able to report and explain this.

Be able to perform and interpret any SPSS procedures that we do for this chapter.