Which of the following is likely to improve the external validity of a research study ?...
Which of the following is likely to improve the external validity of a research study ?
a. Being sure that all participants have the same ethic background
b. Using only first year students and sophomores as participants
c.Employing only one type of experimenter
d. Including groups from various cultures
Homework Answers
The external validity of a research experiment depends on the extent to which the experiment conducted on a given sample can be extended to real life situations across various contexts.
If a research study included participants from a single ethnic background, the result of the experiment may not hold true for participants belonging to other groups.
Option a) is incorrect.
First year students and sophomores form a highly specific group and the result cannot be generalized to include people belonging to other age groups and educational backgrounds.
Option b) is incorrect.
Employing only one type of experimenter tends to undermine the external validity of an experiment as perspectives of multiple experimenters cannot be included.
Option c) is incorrect.
The external validity of an experiment is enhanced by including groups from various cultures. When this is done, the results hold true for people from various cultures as well.
Option d)Including groups from various cultures is correct.
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