Week 6 – Module Topic inclusive of Sampling and Reliability
One valuable component of research includes data collection and the validity of your research information. Research is a serious initiative, think about what if your data, methodology or eventual outcome methods are not quite up to standard. Your sample sizes were not correct; your information was affected; you could disseminate the wrong information, thus affecting populations at large. We have an ethical responsibility to do the right thing for our perspective communities as well as our healthcare professionals. For those who choose to continue their studies at the doctoral level, research, it is methodology, its application to practice (for DNP candidates) and the generation of new knowledge (for Ph.D. candidates), will quickly discover the importance of mastering these skills or having access to available resources.
Chapter 8: Sampling
Let us explore the various types of sampling that will be involved in this module. Sampling is the process of selecting units (e.g., people, organizations) from a population of interest so that by studying the sample, we may somewhat generalize our results back to the population from which they were chosen. Please review chapter 8 in your Tappen class text.
Video: Sampling… What is sampling?
Article: Sampling in Research
So how does one begin?
Methods of sampling from a population
Simple random sampling. In this case, everyone is chosen entirely by chance, and each member of the population has an equal chance, or probability, of being selected. Please become familiar with the following concepts.
Chapter 9: Reliability
Class, when it comes to reliability and validity, these concepts are associated with the highest quality of measurement in your research endeavors. Chapter 9 has an emphasis on reliability, although there is mention of validity, much of this content is associated with your reading assignment in Chapter 10. However, since there is an overlap in these concepts, you will hear mention regarding the topic. I hope not to confuse anyone.
Please note that reliability is one of the most important qualities of a research tool. Think of reliability as an instrument of measure that determines the degree of consistency with which it measures the attribute for what it is supposed to measure. If a measuring tool is accurate, it is said to be reliable.
Estimation of reliability:
Petty, R. E, Briñol, P., Loersch, C., & McCaslin, M. J. (2009). The need for cognition. In M. R. Leary & R. H. Hoyle (Eds.), Handbook of individual differences in social behaviour (pp. 318–329). New York, NY: Guilford Press
For additional clarification and supplemental resources, please access the following:
Video: Understanding Measurement Validity
Video: Reliability and Validity of Measurement
Article: Understanding Reliability and Validity in Qualitative Research
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