Answer Happy

Which of the following is NOT true about external validity? A External validity is the extent of evidence that an experimental stimulus really caused the changes in the outcome. B External validity is also called generalizability Population validity is the extent to which the results of a study using a sample can be generalized to a larger group of similar people. Ecological validity is about whether the result of a study can be generalized to other conditions or to the real world. Threats to ecological validity exist because study participants behave or respond differently because they are in a research study