Your grandfather has been an avid smoker for most of his adult life. You are visiting him and he suddenly becomes weak, dizzy, and confused, has shortness of breath and is feeling acute chest pain. What is your grandfather experiencing?

Which of the following depressed people would be the least likely to be diagnosed with a mental disorder—because of specific circumstances?

A) someone whose mother was depressed B) someone whose community was destroyed by a tornado C) someone who was experiencing a chemical brain imbalance D) someone who was also an alcoholic

People can use machines more easily

(a) when the control information is in the environment (b) when the control information has to be memorized (c) when the designer employs user-centered conceptual models (d) when control information is meaningful, not arbitrary (e) A, C and D are all correct