Discussion: Sampling and Collecting Quantitative and Qualitative Data

Specific methods of data collection (e.g., surveys, interviews, observations) produce specific types of data that will answer particular research questions, but not others; so here too, as covered in previous weeks, the research questions inform how the data will be obtained. Furthermore, the method used to collect the data may impact the reliability and the validity of that data.

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.

Position B: Nonprobability (or purposive) sampling represents the best strategy for selecting research participants.

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.

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.

DISCIPLIN: SPANISH AND COMPUTER SCIENCE TEACHER IN HIGH SCHOOL

RESOURSES

Teddlie, C., & Yu, F. (2007). Mixed methods sampling: A typology with examples. Journal of Mixed Methods Research, 1(1), 77–100. doi:10.1177/1558689806292430
Mixed Methods Sampling: A Typology with Examples by Teddlie, C., & Yu, F., in Journal of Mixed Methods Research, Vol. 1/Issue 1. Copyright 2007 by Sage Publications Inc. Reprinted by permission of Sage Publications Inc. via the Copyright Clearance Center.