Dr. lonsbary is considering doing a follow-up study in which instead of asking participants to listen to music to induce mood, she has them write either a story about a character who just won the lottery or a story about a character who just experienced the death of their spouse. this change in the mood variable is designed to enhance the study's: .

The right answer is “External validity”

Explanation:

External validity explains how the results of a study are anticipated to apply to other contexts. Basically, it solves the doubt if the research can be used in other conditions, settings, people, etc., if it can be generalized. As much as it can be imitated, then the external validity is high, and vice versa.  

answer; can each be concretely realized in different ways;