You will need to go to my week 10 research theory class in my student portal on Walden university website.m access all necessary resource links. 
For this Discussion, you will first consider sampling strategies. Then, you will turn your attention to data collection methods, including their strengths, limitations, and ethical implications. Last, you will consider measurement reliability and validity in the context of your discipline.
With these thoughts in mind, if use Position B. Position B: Nonprobability (or purposive) sampling represents the best strategy for selecting research participants.
Post a restatement of your assigned position on sampling strategies. Explain why this position is the best strategy for selecting research participants. Support your explanation with an example and support from the scholarly literature. Next, select a data collection method (e.g., surveys, interviews, observations) and briefly explain at least one strength and at least one limitation. Then, identify a potential ethical issue with this method and describe a strategy to address it. Last, explain the relationship between measurement reliability and measurement validity using an example from your discipline.
Be sure to support your Main Issue Post and Response Post with reference to the week’s Learning Resources and other scholarly evidence in APA Style.
Read a selection of your classmates’ postings. Respond to a classmate who was assigned the opposite position by further supporting or respectfully countering his or her position.
https://web.p.ebscohost.com/ehost/detail/detail?vid=0&sid=fa37f880-75df-486c-a24f-34ad9cffe91c%40redis&bdata=JkF1dGhUeXBlPXNoaWImc2l0ZT1laG9zdC1saXZlJnNjb3BlPXNpdGU%3d#AN=79555639&db=eue
https://academicguides.waldenu.edu/research-center/student-research/data-sources