When grandpa has difficulty reading a newspaper 20 inches from his face, but can clearly see the television that is 20 feet away, he most likely has
A. presbyopia.
B. age-related macular degeneration.
C. glaucoma.
D. retinitis pigmentosa.
Answer: A
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Why are double-blind studies of medication effectiveness necessary?
a. A placebo is not a treatment. b. If expectancies are too high, treatment might fail. c. Physicians' expectations can influence patients' expectations. d. Patients can't tell if a medication is real.
In body language, liking is communicated by
a. casual positioning of arms and legs. b. leaning toward a person or object. c. crossing the arms and legs. d. staring.
Which of the following is an important criticism of the Big Five and other lexical models of personality?
A) It fails to correlate with important real-world behaviors. B) It focuses too little on the conscious processing of information. C) People may not be consciously aware of all aspects of personality. D) People's attitudes are seldom useful as a means for predicting their aggregated behavior.
Why is getting enough sleep particularly important for children?
A. It produces growth hormones. B. It relieves excess anxiety. C. It improves IQ scores. D. It processes daily experience.