2. Think of an independent variable you would like to investigate.

Perhaps focus on an intervention from the field of audiology or speech-language pathology. Think about whether you would investigate this variable with a treatment and control group or with two or more levels of treatment. Which of the true experimental designs discussed in this chapter would be appropriate for investigating the variable you chose?

What measures will you use for your pretest and/or posttest? How many participants will you need to recruit and how will you assign them to the different groups?