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Selecting Research Participants - SAGE Publications Inc

125 CHAPTER 6 Selecting Research ParticipantsOBJECTIVESA fter studying this chapter, students should be able to Define the term sampling frame Describe the difference between random sampling and random assignment Define the term probability sampling Describe the difference between random , systematic, strat-ified, cluster, and multistage sampling Define the term nonprobability sampling Describe the difference between convenience, quota, and referral sampling Determine the best sampling method for a given Research problem Describe the relationship between sample size and effect size Describe the relationship between statistical power and sample sizeHave you ever received a phone call from someone who works for some Research insti-tute and wants a few minutes of your time?

the experimental group and 20 to a control group. This would be an example of random assignment of participants to conditions. In Chapter 7, we will discuss experimental designs where random assignment will be used to create the groups in a study. Figure 6.1 illustrates the difference between random selection and random assignment. Systematic ...

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