This is my first presentation for this class. I will be covering topic 29: Nonprobability Sampling and Qualitative Research and topic 30: Sampling and Demographics.
The first part of my presentation seeks to explore the differences and similarities between probability and nonprobability sampling. Following this, we explore purposive sampling and three strategies for making use of it. This is an important section since it details the different selection criteria this method of sampling employs while also explaining distinguishing characteristics for each method. This topic closes with a further examination into theoretical sampling, snowball sampling, and samples of convenience.
The topic 30 section of the presentation is much shorter and puts the focus upon the importance of demographics in sampling. This is especially important in qualitative research since these demographics can foster comparisons and analysis while also seeking to explain trends or biases that a researcher’s selected population might incur. This section of the presentation then closes with a further examination of research sample dropouts and mortality.
A YouTube video of my presentation is embedded below, but I have also listed a hyperlink in case the Mini Player malfunctions.
I mentioned in my post how bias had altered a survey I had done in 2020 as part of a business plan. I considered it to be a little unreliable as I didn’t consider any population diversity as part of my sampling. However, after understanding nonprobability sampling a bit more I now realize a new implementation that can be done. By shifting the focus from a whole to the same targeted demographic I took the sample, I can get similar numbers to how the sample was pulled. This will take a bit of extra time to figure out, but in the end the results will be more accurate and reliable to the original sample.
Thank you very much for taking the time to go over this and explain it in depth. I never took into account the problems or difficulties that bias can cause in studies before hand. The mortality rate is also something that interests me, in terms of possibly doing an entirely new study based on why the participants quit. Great work!