CRCJ 3001 Lecture 4: LECTURE 4 - Sampling; Research Strategies; Validity
10 Feb 2017
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Modality: the in which variable is measured e. g. self-report modality for laugh experiment. Population: defined by the interest to the researcher. Sample: a set of individuals selected from the population and intended to represent the population. Results from sample are generalized to the population. Target population: the entire set of individuals of interest to the researcher. Accessible population: an accessible group that represents the population and are used for drawing the sample. Representativeness: how accurately we can generalize the results from a given sample to the population. Bias is a major threat characteristics that are noticeable different from those of the population. Due to selection bias (or sampling bias): sampling procedures favored the selection of some individuals over others. Size of the sample is also a major threat as the sample size becomes larger, the sample results tend to be more representative of the population (30 subjects minimum for each level)
