Dr. Rodriquez is considering conducting a study examining whether narcissistic people have poorer romantic relationships than those who are not narcissistic. To measure narcissism, she uses a narcissism scale created by a colleague. Question 1 of the scale reads, I tend not to think about other people as much as I think about myself. Question 2 reads, I do not have a high opinion of myself. Question 3 reads, I think other people think I am really special. Dr. Rodriquez is concerned whether the scale will really measure narcissism or if it will measure some other related concept. In short, she is concerned about the scale s _____________ .

If Dr. Rodriquez is concerned about whether the scale will actually be able to measure narcissism, which is the main object of the research, he is concerned about whether the results presented by the scale will be truthful, that is, he is concerned about the veracity of scale, which is the capacity of that scale to present real and true results and thus promote efficient research.