What term refers to the extent to which a research finding can be applied to larger population?
Note to EPSY 5601 Students: An understanding of the difference between population and ecological validity is sufficient. Mastery of the sub categories for each is not necessary for this course. External Validity There are two types of study validity:
internal (more applicable with experimental research) and external. This section covers external validity. External validity involves the extent to which the results of a study can be generalized (applied) beyond the sample. In other words, can you apply what you found in your study to other people (population validity) or settings (ecological validity). 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). Threats to External Validity 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
Ecological Validity the extent to which the results of an experiment can be generalized from the set of environmental conditions created by the researcher to other environmental conditions (settings and conditions).
Bracht, G. H., & Glass, G. V.
(1968). The external validity of experiments. American Education Research Journal, 5, 437-474. Del Siegle, Ph.D. What is the extent to which research findings can be applied to larger population?Therefore, The extent to which the findings of a research study are generalizable is called External validity.
What is referred to as the extent to which the results of the study can be applied beyond the sample and the settings used in the study?External validity involves the extent to which the results of a study can be generalized (applied) beyond the sample. In other words, can you apply what you found in your study to other people (population validity) or settings (ecological validity).
What is meant by generalizability?In its simplest form, generalizability can be described as making predictions based on past observations. In other words, if something has often happened in the past, it will likely occur in the future.
Which type of research design is useful for collecting large amounts of information from a large number of people in a short period of time?Cross-sectional studies typically allow researchers to collect a great deal of information quickly. Data is often obtained inexpensively using self-report surveys. Researchers are then able to amass large amounts of information from a large pool of participants.
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