If a test provides an accurate measure of what it is supposed to measure, we say that the test is

When children engage in conversations with adults, they practice all of the following pragmatic skills except

a. stating their message clearly. b. using appropriate grammar. c. turn-taking. d. staying on topic.

After experiencing the Hurricane Katrina tragedy, Ronald moved from New Orleans, yet he cannot stop thinking about the disturbing event even though he avoids any documentary or mention of the event. His friends describe him as constantly nervous, although it has been years since the event. Ronald is exhibiting symptoms of

a. a dissociative disorder. b. a somatoform disorder. c. a stress disorder. d. paranoia.