PSY 290A Lecture Notes - Lecture 14: Simple Random Sample, Multistage Sampling, Convenience Sampling
11 Dec 2016
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Document Summary
Population - a larger group from which a sample is drawn; the group to which a study"s conclusions are intended to be applied. Sample - the group of people, animals, or cases used in a study; a subset of the population of interest. Simple random sampling - the most basic form of probability sampling, in which the sample is chosen completely at random from the population of interest (e. g. , drawing names out of a hat). Stratified random sampling - a form of probability sampling; a random sampling technique in which the researcher identifies particular demographic categories of interest and then randomly selects individuals within each category. Oversampling - a form of probability sampling; a variation of stratified random sampling in which the researcher intentionally overrepresents one or more groups. Systematic sampling - in an experiment, the levels of a variable coinciding in some predictable way with experimental group membership, creating a potential confound.
