Dr. Rodriquez is considering conducting a study examining whether narcissistic people have poorer romantic relationships than those who are not narcissistic. One of her first tasks is to determine which of her participants are narcissistic and which are not. She decides to use the scale created by a colleague, the Donal scale. Question 1 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 decides to test the internal reliability of her measure. Which of the following results would make her happy?
A)↑ = 0.10
B)↑ = −0.03
C)↑ = 0.95
D)↑ = −0.98

Question

Quizplus · Accepted Answer

Internal reliability refers to the consistency of scores within a measure, and is typically assessed using Cronbach's alpha. This value ranges from 0 to 1, with higher values indicating better internal reliability. A value of 0.95 would indicate that the questions on the Donal scale are highly related to each other, and thus are measuring the same construct (narcissism) consistently. Choices A and B indicate poor reliability, while choice D indicates a negative correlation which is not possible as Cronbach's alpha ranges from 0 to 1.

Dr Rodriquez Is Considering Conducting a Study Examining Whether Narcissistic