Individuals who wear glasses on their face would always see the frames blocking their vision if the human nervous system didn't respond to unchanging stimulation through:

What change occurs as you pass through Stages 1, 2, 3, and 4 of sleep?

a) sleep becomes progressively lighter b) sleep becomes progressively deeper c) dreaming becomes less frequent in each stage d) dreaming becomes more frequent in each stage

What general principle is demonstrated when solving the Luchins water jug problem?

a) Humor enhances creativity. b) Heuristics generally outperform algorithms. c) Problem solving is related to the effort put forth. d) Successful problem solving can sometimes blind us to easier approaches.