Which of the following neurotransmitters affects neurons involved in learning, dreaming, and waking from sleep?

Responding to a substance, such as a sugar pill or a saline injection, as if it were the real drug is referred to as

a. the placebo effect. b. an anthropomorphic error. c. the somatization variable. d. a psychosomatic complication.

A double-blind experiment would be used for all of the following EXCEPT to a. minimize researcher bias. b. minimize changes in subjects' behavior caused by the unintended influence of an experimenter's actions

c. control for research participant bias. d. eliminate the need for randomly assigning participants to experimental and control groups.