![]() ![]() the extent to which personological variables interact with treatment effects– If the sample is drawn from an accessible population, rather than the target population, generalizing the research results from the accessible population to the target population is risky.Ģ. the extent to which one can generalize from the study sample to a defined population–.Population Validity the extent to which the results of a study can be generalized from the specific sample that was studied to a larger group of subjects A study of fifth graders in a rural school that found one method of teaching spelling was superior to another may not be applicable with third graders (population) in an urban school (ecological). ![]() ![]() ![]() In other words, can you apply what you found in your study to other people (population validity) or settings (ecological validity). This section covers external validity.Įxternal validity involves the extent to which the results of a study can be generalized (applied) beyond the sample. There are two types of study validity: internal (more applicable with experimental research) and external. –to whom can the results of the study be applied– Mastery of the sub categories for each is not necessary for this course. Note to EPSY 5601 Students: An understanding of the difference between population and ecological validity is sufficient. ![]()
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