Dr. Whetstone is curious about how self-esteem changes as a result of a new counseling program. She is concerned about testing threats in her study. Which of the following would you recommend to her as a way to address this type of threat?
A) Refusing to let participants drop out of the study
B) Conducting a pretest-only study
C) Using a different measure of self-esteem at pretest than at posttest
D) Omitting a comparison group

Self-esteem is an individual subjective evaluation of his own worth and value also refers to the beliefs about oneself. Hence is a type of self-concept. It's an attractive psychological construct to predict certain outcomes and achievements.

Hence when Dr. Whetstone is curious about herself or his self-esteem changing due to the new counseling program. She is checking the threats in her study.

Hence the option C is correct.

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