The subjects who participate in an experiment should
a. all be chosen from the same geographical area and socioeconomic class.
b. be allowed to choose in which group they would like to be.
c. come from a wide range of different age groups.
d. be carefully chosen so that they represent a sample of the population.
D
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An action potential takes place by means of what?
a. The flow of electrical charges on the myelinc b. The synthesis of neurotransmitters in the center of the axon c. The movement of sodium ions across the membrane d. The flow of water down the center of the axon
Which of the following statements accurately describes the sampling distribution of means?
a. The distribution of several sample means when an infinite number of samples of the same size N are selected from one raw score population. b. The distribution of all possible sample means when a given finite number of samples of the same size N are selected from one raw score population. c. The distribution of all possible sample means when an infinite number of samples of variously sized Ns are selected from several raw score populations. d. The distribution of all possible sample means when an infinite number of samples of the same size N are selected from one raw score population.
The most universally recognized facial expression is
a. pursed lips. b. smiling. c. sticking out your tongue. d. raising your eyebrows.
John travels frequently to distant parts of the globe. He believes that adjusting his mealtimes to the destination time zone is helpful in dealing with jet lag. After studying the material in your textbook, you tell John that a. he's wasting his time, as adjusting his mealtimes will have little if any effect on jet lag
b. he should expect some benefits, as his suprachiasmatic nucleus (SCN) is very responsive to changes in feeding patterns. c. he should expect some benefits, as his peripheral clocks should respond to changes in feeding patterns. d. this is a highly effective strategy, because both his SCN and peripheral clocks are highly sensitive to changes in feeding patterns.