When you took your college entrance exam, students across the country took the same test at the same time with the same instructions. What characteristic of a good psychological test do these similarities reflect?

The psychological dimension of auditory experience related to the intensity of a sound wave is called _______________

a. frequency b. pitch c. loudness d. timbre

During young adulthood, the heart muscle starts to become ____, but this is not noticeable except during times of ____

a. more pliable; deep relaxation b. more rigid; intense physical activity c. more pliable; intense physical activity d. more rigid; deep relaxation