What is purposive sampling?

Purposive sampling is a non-probability sampling technique used to select participants based on specific criteria.

Purposive sampling, also known as judgmental or selective sampling, is a sampling technique used in research studies where the researcher selects participants based on specific criteria. This technique is often used when the population of interest is small or difficult to access.

The researcher identifies the characteristics or traits that are important for the study and selects participants who possess those traits. For example, if a researcher is conducting a study on the effects of exercise on individuals with diabetes, they may purposively sample individuals who have been diagnosed with diabetes and are physically able to exercise.

Purposive sampling can be useful in situations where the researcher wants to ensure that the sample is representative of a specific population or when the researcher wants to study a specific subgroup within a population. However, it is important to note that purposive sampling is not a random sampling technique and therefore, the results may not be generalizable to the larger population.

In conclusion, purposive sampling is a non-probability sampling technique used to select participants based on specific criteria. It can be useful in certain research situations, but it is important to consider the limitations of this technique.