Subject to bias: Voluntary sampling is highly susceptible to bias, because researchers make little effort to control sample composition.Feasibility: Finding volunteers is often a relatively fast and affordable way to collect data. A researcher using voluntary sampling typically makes little effort to control sample composition. Volunteers can be solicited in person, over the internet, via public postings, and a variety of other methods. Voluntary sampling occurs when researchers seek volunteers to participate in studies. Here are some different ways that researchers can sample: Voluntary Sampling Often, researchers use non-random convenience sampling methods but strive to control for potential sources of bias. However, most online research does not qualify as pure convenience sampling. Convenience samples are often based on who it’s easy for the researchers to contact. Non-random sampling techniques lead researchers to gather what are commonly known as convenience samples. At a practical level, what methods do researchers use to sample people and what are the pros and cons of each? Although these conversations are important, it is good to occasionally talk about what sampling looks like on the ground. That is, researchers like to talk about the theoretical implications of sampling bias and to point out the potential ways that bias can undermine a study’s conclusions. Pros and Cons of Different Sampling MethodsĬonversations about sampling methods and sampling bias often take place at 60,000 feet. By Aaron Moss, PhD, Cheskie Rosenzweig, MS, & Leib Litman, PhD Online Researcher’s Sampling Guide, Part 4:
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