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What are threats to external validity?
"A threat to external validity is an explanation of how you might be wrong in making a generalization."[4] Generally, generalizability is limited when the cause (i.e. the independent variable) depends on other factors; therefore, all threats to external validity interact with the independent variable.
External validity in an experimental design refers to?
The ability to apply findings to other populations
Why should hypotheses testable?
How else would you determine the validity of the hypothesis.
What is the differences between external and internal validity in research?
Internal validity has to do with the accuracy of the results. Results could be inaccurate if samples are not selected randomly. External validity has to do with the generalizability of the findings to the population. If the sample selected is only Hispanics under the age of 25, then it would be hard to generalize the results to the entire US population.
In the scientific method What statement attempts to explain an observed phenomenon?
The scientific method uses a hypothesis or hypothetical explanation, which is tested to determine its validity.
If you gain internal validity do you lose external validity?
If you gain internal validity do you lose external validity
Examples External validity and internal validity in research?
examples of internal and external validity
Is it easier to increase internal validity than external validity?
No it is not easier because of the external flow.
What is the difference between internal and external validity?
The difference between internal and external validity is in their nature. Internal validity indicates if a study depicts relation between two variables. External validity on the other hand generalizes the study of the variables.
Can a study have internal validity but not external validity?
Yes. Internal validity is whether or not the experiment is studying what it intends to. External validity is whether or not the study can be generalised outside of the study. For example, if you had a perfect experiment set up, that measures something perfectly, then it will have internal validity. You haven't, however, shown that you would get the same results in different cultures, or in different time periods. Thus the experiment may not have external validity.
What are threats to external validity?
"A threat to external validity is an explanation of how you might be wrong in making a generalization."[4] Generally, generalizability is limited when the cause (i.e. the independent variable) depends on other factors; therefore, all threats to external validity interact with the independent variable.
What are threats to validity in epidemiological studies?
The main threats to validity are bias, confounding and chance. But keep in mind the internal and the external validity. Internal validity is the extent to which systematic error is minimised during the stages of data collection. where as the external validity encompasses the extent to which the results of the trials provide a correct basis for generalisation.
Differentiate between external validity from internal validity?
External validity is the extent that results from a study generalize to other people, places, and situations--how well the findings stand outside the study and the extent to which they can be replicated. The internal validity is that extent to which the study's design enables it to measure and study what it intends to study.
What does criterion-related validity refer to and how is it assessed in research studies?
Criterion-related validity refers to the extent to which a measure is related to an external criterion or outcome. It is assessed in research studies by comparing the scores of the measure to the scores of the criterion to determine the strength of the relationship between them.
Compare and Contrast Internal validity vs external validity?
Internal validity is the degree to which the results are attributable to the independent variable and not some other explanations.External validity is the extent to which the results of a study can be generalized.
Define external validity?
is the extent to which the results of study apply to people not in it
External validity in an experimental design refers to?
The ability to apply findings to other populations
