On average, school-age children spend about __________ hours each week watching television

Which three nations have the "oldest" populations?

a) Sweden, China, and Russia b) China, Japan, and India c) China, the United States, and Russia d) Italy, Japan, and Germany

The difficulty you have deciding if the doorbell actually sounded is best explained by

a) Wundt's law. b) absolute thresholds. c) signal detection theory. d) the law of perceptual paradox.