PSY 250 Study Guide - Quiz Guide: Random Assignment, Internal Validity, Dependent And Independent Variables
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Internal validity- in general, experimental research is high in internal validity, correlational research is low in internal validity, and quasi-experimental research is in between. Research- most likely to be conducted in field settings in which random assignment is difficult or impossible. I. implemented and once after it is implemented. ; disadvantages are difficult to ensure that each member of a large pop. is actually chosen. Srs- population is divided into different subgroups or strata (usually based on demographic characteristics) and then a random sample is taken from each stratum , adv. are reduces biases for sampling according to some charac. of pop. ; disadv is it"s difficult to ensure that each member of a large pop could be chosen. Cs- larger clusters of individuals are randomly sampled and then individuals within each cluster are randomly sampled, adv. are easier to choose members randomly from smaller clusters to better rep. pop.
