To Examine His Hypothesis That Children's Creativity Levels Decrease with Age

Multiple Choice

To examine his hypothesis that children's creativity levels decrease with age, Dr. Leno asks children how many imaginary friends they have and considers their answers to be a measure of their creativity. A second researcher, Dr. Letterman, disagrees that the answers are a measure of creativity and instead believes that the number of imaginary friends a child has is an indicator of level of mental disturbance. Dr. Letterman believes Dr. Leno's measure of creativity has a problem with its

A) external validity.
B) relevance to the hypothesis.
C) reliability.
D) interrater agreement.