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Subjects, Participants, and Sampling
Web Sites
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- Sampling Terminology
This is a section of Trochim’s web site that presents a good overview of the terminology used when discussing sampling.
- Research Randomizer: Instant Random Sampling and Random Assignment
This web site is designed to assist researchers and students who want an easy way to perform random sampling or assign participants to experimental conditions.
- Probability Sampling
This is a Trochim page defining probability sampling in concept and discussing numerous probability sampling techniques.
- Non-Probability Sampling
This is a Trochim page defining non-probability sampling in concept and discussing numerous non-probability sampling techniques.
- Differentiating Probability and Non-Probability Sampling
This is an outline for McMillan and Schumacher’s Introduction to Educational Research text. It contains an interesting metaphor for differentiating probability and non-probability sampling, and it discusses the issues related to the use of each.
- Sample Size Calculator
This is a Pearson Education, Inc. web site that addresses sample size issues. Two questions can be answered using the online calculator. The first is, “How many completed surveys do I need?” The second is “How confident can I be in the information gathered?”
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