Research

80. If you're trying to establish a causal relationship between a reinforcer and increased performance, you should use a(n) __________ method.

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79. The essence of the experimental method is

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78. A scientist wants to find out if there is empirical evidence for a relationship between caffeine and aggressive behavior. She would

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77. One of the limitations of the case study is that

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76. The effects of brain injury on personality would usually be investigated by the use of the

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75. A representative sample is an essential element of the

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74. A correlation coefficient of -1.09 indicates a(n)

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73. Which of the following coefficients of correlation indicates the weakest relationship between two sets of variables?

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72. Theories explain results, predict future outcomes, and

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71. Which of the following could serve as an experimental hypothesis?

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