5-‘In theoretical sampling the sample is ‘not selected from the population based on certain variables prior to the study, rather the initial sample is determined to examine the phenomena where it is found to exist. Then, data collection is guided by a sampling strategy called theoretical sampling. This implies that the researcher starts the study with a sample where the phenomenon occurs and then the next stage of data collection is when theoretical sampling begins. Theoretical sampling is the process of data collection whereby the researcher simultaneously collects, codes and analyses the data to decide what data to collect next. Deciding where to sample next according to emerging codes and categories is theoretical sampling” (Coyne, 1997)
An example might include a group of Caucasian men, ages 60-70, diagnosis of heart failure. The study could include the effects of following a sodium and fluid restriction diet and the impact on the men’s health.
“Generalizability is a measure of how useful the results of a study are for a broader group of people or situations. If the results of a study are broadly applicable to many different types of people or situations, the study is said to have good generalizability. If the results can only be applied to a very narrow population or in a very specific situation, the results have poor generalizability” (Hydrocephalus, n.d)
Coyne, I. (1997). Sampling in qualitative research. Purposeful and theoretical sampling; merging or clear
boundaries? Journal of Advanced Nursing, 26(3), 623-630. Retrieved 9 13, 2018, from
Hydrocephalus Association, n.d. Research 101: Generalizability. Retrieved 9 13, 2018, from
6-I agree with you that Sampling is choosing a determinate variable within a research study. There are many steps in the process of choosing a sample.” Sampling theory was developed to determine the most effective way of acquiring a sample that accurately reflects the population under study. And to add that Sampling also entails studying a chosen group of people who represents a larger population. Sampling theory describes two sampling domains: probability sampling and non-probability sampling. In probability sampling findings can be generalized to the given population while in non-probability sampling, findings can only