Results from a research study suggest that a stop-smoking program is very successful.However,the participants who volunteered for the study were all highly motivated to quit smoking and the researcher is concerned that the same results may not be obtained for smokers who are not as motivated.This study has a problem with
A)internal validity.
B)external validity.
C)experimental validity.
D)validity of measurement.

Question

Quizplus · Accepted Answer

The study has a problem with external validity, as the results may not be generalizable to smokers who are not as motivated. External validity refers to the extent to which the findings of a study can be generalized to other populations or settings.

Results from a Research Study Suggest That a Stop-Smoking Program