What has research shown concerning the association between diet and attention-deficit/hyperactivity disorder?

a. Sugar increases hyperactivity.
b. Preservatives increase hyperactivity.
c. Food additives increase hyperactivity.
d. There is no relationship between diet and hyperactivity.

Answer: d.

Psychology

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a. dissociative identity disorder b. bulimia c. depression d. Alzheimer's disease

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A major problem in effective listening is

a. one can think faster than the speaker can talk. b. some speakers talk faster than our brains can process. c. over-utilization of the "third ear." d. ear wax.

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