External validity refers to the extent to which a A research

External validity refers to the extent to which:

a. A researcher will make a Type I error.

b. A researcher will make a Type II error.

c. Cause-and-effect conclusions can be drawn from the results of an experiment.

d. Results of the study can be generalized to the broader population.

Solution

External validity is the extent to which results of a study can be generalized to the world at large, in other words to the larger population. Hence, option d is correct.