When Haylee takes a personality test, the researcher gives her detailed instructions and plenty of time to complete it. But Tyler takes the same test and is given only vague instructions and a limited amount of time This procedural difference shows that the test lacks:

Early in development, the nervous system begins as a ____

a. tube surrounding a fluid-filled cavity b. spherical structure in the center of the embryo c. diffuse system of cells scattered throughout the body d. single layer of cells covering the heart and other internal organs

The Welsh language allows letter and sound sequences that English does not (e.g., drwy, llwytho). This represents a difference in the two languages':

a. phonology b. syntax c. semantics d. pragmatics

Which of these is an example of one of the opportunistic infections that tend to occur in people infected with HIV?

a) shingles b) pneumonia c) multiple sclerosis d) Huntington's disease

What can you assume about the general relationship between mental age and chronological age in most children?

A. As chronological age increases, mental age generally decreases. B. As chronological age increases, mental age generally remains stable. C. As chronological age increases, mental age generally increases. D. As chronological age increases, mental age generally becomes unstable.