PSYCH 2300 Chapter Notes - Chapter 7: Nonprobability Sampling, Oversampling, Internal Validity
19 Aug 2016
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Sampling: estimating the frequency of behaviors and beliefs. Generalizability: does the sample represent the population: external validity: extremely important for frequency claims, pertains to both samples and settings, concerns whether the sample used in the study is adequate representation of unstudied population, populations and samples. A larger group from which a sample is drawn. The group of people, animals or cases used in a study. A set of observations that contains all members of the. Just b/c a sample comes from a population does not mean it is representative of a population. A sample in which some members of the population of interest are systematically left out, as a consequence, the results from the sample cannot generalize to the population of interest. Sample may have too many unusual people, only one type of people. Sampling only those who are most easy to contact. Choosing a sample based on those who are easiest to access and readily available.
