# Week 7:Sampling

Week 7:Sampling. It is impossible to study the entirety of any particular population. However, researchers can collect data for their studies from a sample of a particular population. There are two methods of sampling available for researchers: probability sampling and nonprobability sampling. This week, you examine the terminology used for the sampling aspect of research as well as best practices for its implementation. Then you critique a research study’s use of sampling in order to further understand the relationship between sampling, causality, and generalizability.

## Learning Objectives

##### Week 7:Sampling
###### Students will:
• Create two sampling structures
• Evaluate strengths and limitations of two sampling methods
• Analyze samples in a case study
• Analyze generalizability in a case study
• Evaluate method and methodology used in a research study

# Learning Resources

Note: To access this weekâs required library resources, please click on the link to the Course Readings List, found in the Course Materials section of your Syllabus.

Yegidis, B. L., Weinbach, R. W., & Myers, L. L. (2018). Research methods for social workers (8th ed.). New York, NY: Pearson.

• Chapter 9, âSampling Issues and Optionsâ (pp. 202-222)

#### Optional Resources

Plummer, S.-B., Makris, S., & Brocksen S. M. (Eds.). (2014).Social work case studies: Foundation year. Baltimore, MD: Laureate International Universities Publishing. [Vital Source e-reader].

• Social Work Research: Program Evaluation

# Discussion 1: Sampling Structures

Probability and nonprobability are the two general categories of sampling. Probability sampling uses random selection, whereas nonprobability sampling does not. For example, if you wanted to study the effects of divorce on the psychological development of adolescents, you could gather a population of a certain number of adolescents whose parents were divorced. Then, out of that population, you could randomly select 25 of those people. If you wanted to use nonprobability sampling, you would choose specific people who had met predetermined criteria. For this Discussion, consider how samples would be chosen for both probability and nonprobability sampling structures.

Week 7:Sampling

#### By Day 3

Post your explanation of the following:

• Using your research problem and the refined question you developed in Week 4, develop two sampling structures: probability and nonprobability.
• Explain who would be included in each sample and how each sample would be selected.
• Be specific about the sampling structures you chose, evaluating both strengths and limitations of each.

Week 7:Sampling

#### By Day 5

Respond to a colleague’s post by suggesting an alternative sampling structure for their research question as well as an alternate way of selecting the sample. Please use the resources to support your answer.

Week 7:Sampling

Week 7 Discussion 1 Rubric

##### Post by Day 3 and Respond by Day 5

To participate in this Discussion:

Week 7 Discussion 1

# Discussion 2: Generalizing Study Results

Generalizability is the extent to which research findings from your sample population can be applicable to a larger population. There are many best practices for ensuring generalizability. Two of those are making sure the sample is as much like the population as possible and making sure that the sample size is large enough to mitigate the chance of differences within the population. For this Discussion, read the case study titled “Social Work Research: Program Evaluation” and consider how the particular study results can be generalizable.

Week 7:Sampling

#### By Day 5

Post your explanation of who the sample is. Also explain steps researchers took to ensure generalizability. Be sure to discuss how the study results could possibly be generalizable. Please use the resources to support your answer.

Week 7:Sampling

#### By Day 7

Respond to a colleague’s post by suggesting two alternative ways that the study results could be generalizable. Please use the resources to support your answer.

Week 7:Sampling

Week 7 Discussion 2 Rubric

##### Post by Day 5 and Respond by Day 7

To participate in this Discussion:

Week 7 Discussion 2

# Assignment: Research Design and Sampling

Using the empirical research article that your instructor approved in the Week 5 assignment, ask yourself: âIs this a quantitative research article or a qualitative research article?â Remember, in quantitative research, the emphasis is on measuring social phenomenon because it is assumed that everything can be observed, measured, and quantified. On the other hand, in qualitative research, it is assumed that social phenomenon cannot be easily reduced and broken down into concepts that can be measured and quantified. Instead, there may be different meanings to phenomenon and experiences. Often in qualitative research, researchers use interviews, focus groups and observations to gather data and then report their findings using words and quotations.

Consider how these different methods affect the sampling design and recruitment strategy, and ask yourself how the recruitment of research participants will affect the findings.

For this Assignment, submit a 3-4 page paper. Complete the following:

• Read your selected empirical research article, and identify whether the study is a quantitative or qualitative study. Justify the reasons why you believe it is a quantitative or qualitative study. (Your instructor will indicate to you if you are correct in identifying the research design. This will point you to whether you will use the âQuantitative Article and Review Critiqueâ or the âQualitative Article and Review Critiqueâ guidelines for the final assignment in week 10.)
• Using the empirical research article, focus on the sampling method in the study and begin to evaluate the sampling method by answering the following:
• Describe the sampling methods in your own words (paraphrase, do not quote from the article).
• Describe the generalizability or the transferability of the research finding based on the sampling method.
• Discuss the limitations the article identified with the sample and how those limitations affect the reliability or credibility.
• Explain one recommendation you would make to improve the sampling plan of the study that would address these limitations in future research.

Week 7:Sampling

#### By Day 7

To submit your completed Assignment for review and grading, do the following:

• Please save your Assignment using the naming convention âWK7Assgn+last name+first initial.(extension)â as the name.
• Click the Week 7 Assignment Rubric to review the Grading Criteria for the Assignment.
• Click the Week 7 Assignment link. You will also be able to âView Rubricâ for grading criteria from this area.
• Next, from the Attach File area, click on the Browse My Computer button. Find the document you saved as âWK7Assgn+last name+first initial.(extension)â and click Open.
• If applicable: From the Plagiarism Tools area, click the checkbox for I agree to submit my paper(s) to the Global Reference Database.
• Click on the Submit button to complete your submission.

Week 7:Sampling

Week 7 Assignment Rubric

##### Check Your Assignment Draft for Authenticity

To check your Assignment draft for authenticity:

Submit your Week 7 Assignment draft and review the originality report.

##### Submit Your Assignment by Day 7

Week 7 Assignment

# Week in Review

This week you analyzed samples and generalizability in a case study. In addition, you evaluated method and methodology used in a research study and the strengths and limitations of two sampling methods.

Next week you will be introduced to preparation and operationalization procedures for measuring data. You will also be introduced to a variety of ways to acquire quantitative data, including secondary data, systematic observation, interviews, questionnaires, and surveys.

To go to the next week:

Week 8

Week 7:Sampling

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Week 7:Sampling

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