Drugs that simultaneously elevate and depress the central nervous system tend to cause users to experience:
A. hallucinations.
B. paranoia.
C. stupor.
D. agitation.
Answer: A
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Psychological states such as anxiety and depression can impair the functioning of the immune system
Indicate whether the statement is true or false
Researchers conducting an epidemiological study are concerned about the influence of social desirability factors. In other words, the researchers are concerned that
a. the editors of the journal where they hope to publish their results are biased toward "feel-good" articles. b. they will be unable to communicate their hypotheses to participants. c. participants will tend to withhold embarrassing information and report information that places them in a favorable light. d. they will not be able to sample as many segments of society as they would like.
Frequently, school-age children on a baseball field will shout, "Think fast!" and immediately throw a baseball in the direction of a teammate. What is being tested is the teammate's
forearm strength. reaction time. team spirit. ability to field balls.
Discuss the concept of validity, and describe internal and external validity
What will be an ideal response?