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Field, L., Pruchno, R.A., Bewley, J., Lemay Jr., E.P. & Levinsky, N.G. (2006) Using probability vs nonprobability sampling to identify hard-to-access participants for health-related research: Costs and contrasts. Journal of Aging and Health, 18(4), 565-583.

Learning Objective:  Explain the Difference Between Probabilty and Non-probability sampling

How does the article support the Learning Objective?  The authors discuss both types of sampling and weigh the pros and cons of each in recruiting participants

Summary:  The authors, in seeking participants for a longitudinal study on patients and their spouses, compared and contrasted the participants they got through probability and non-probability sampling. Probability sampling was more time and cost effective than non probability sampling and the differences between participants in those groups was not significant

Brickman Bhutta, C. (2012). Not by the book: Facebook as a sampling frame. Sociological Methods & Research, 41(1), 57-88.

Learning Objective:  Explain the concept of a sampling frame

How does the article support the Learning Objective?  The author talks about using social media as a non-traditional sampling frame and the pros and cons of that choice

Summary:  Online questionnaires are inexpensive and can be done quickly with the aid of social networking. Snowball sampling can be done efficiently through contacting groups on social networking sites and asking that survey information be sent to members.