Psychology
DAVID G. MYERS, C. NATHAN DEWALL
Thirteenth Edition
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chapter 1
Indicate the answer choice that best completes the statement or answers the question.
1. If results are statistically significant but have a small effect size, the results may
a. lack practical significance.
b. lack a cause-effect relationship.
c. represent a negative relationship.
d. represent a neutral relationship.
2. In one study, introductory psychology students were fitted with electronically activated
recorders so that researchers could sample their daily activities. The researchers were employing
a scientific method known as
a. naturalistic observation.
b. the double-blind procedure.
c. experimentation.
d. the case study.
3. Studies conducted in the late 1990s in which the researcher concluded that children who were
administered the MMR vaccination developed autism were
a. withheld from the public intentionally.
b. accurate.
c. never published by academic journals.
d. discovered to be fraudulent.
4. Seven members of a boys' club reported the following individual earnings from their sale of cookies:
$2, $9,
$8, $10, $4, $9, and $7. In this distribution of individual earnings
a. the median is greater than the mean and greater than the mode.
b. the median is less than the mean and less than the mode.
c. the median is greater than the mean and less than the mode.
d. the median is less than the mean and greater than the mode.
5. Professor Valetta believes that identical twins have similar levels of intelligence largely because
they share common genes. His idea is best described as a(n)
a. theory.
b. replication.
c. naturalistic observation.
d. operational definition.
6. The idea that "people's emotions and personal beliefs often override their acceptance of
objective facts" is expressed in the dictionary definition of
a. false news.
b. post-truth.
c. powerful examples.
d. repetition.
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7. Professor Terrance has conducted a study that examined the relationship between level of
physical activity and academic performance among children. He is most likely to use to
determine if a relationship exists.
a. meta-analysis
b. preregistration
c. a correlation coefficient
d. experimental research
8. The tendency to perceive order in random events often leads to overestimating the value of
a. common sense.
b. operational definitions.
c. informed consent.
d. the double-blind procedure.
9. Dr. Carlson wants to conduct a research study that will examine the sexual behaviors of college
students.
Before she can begin data collection she must submit her research proposal to
a. her institution's review board.
b. the APA.
c. the BPS.
d. her department chair for review.
10. Approximately what percentage of the cases represented by the normal curve fall between
3 and +3 standard deviations from the mean?
a. 34
b. 68
c. 95
d. 100
11. Unconscious gut feelings, or , provide(s) a sharp contrast to explicit, conscious reasoning.
a. theory
b. chance-based explanation
c. common sense
d. naturalistic observation
12. The explanatory power of a scientific theory is most closely linked to its capacity to generate
testable
a. assumptions.
b. correlations.
c. predictions.
d. variables.
13. Several weeks after a political election, voters often exaggerate their ability to have predicted
the election outcome. This best illustrates
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a. the placebo effect.
b. random assignment.
c. wording effects.
d. hindsight bias.
14. Repeating the essence of a previous research study to verify whether its findings extend to a
new group of research participants and to different circumstances is called
a. replication.
b. random sampling.
c. naturalistic observation.
d. the double-blind procedure.
15. What was the Oxford English Dictionary's word of the year in 2017?
a. false news
b. preregistration
c. post-truth
d. repetition
16. Neither the researchers nor the participants in a study of a weight-loss pill know which
participants have actually received a drug designed to help weight loss and which have received
a placebo. This investigation involves the use of
a. naturalistic observation.
b. random sampling.
c. the double-blind procedure.
d. replication.
17. Which of the following correlations between self-esteem and physical appearance would enable
you to most accurately predict physical appearance from knowledge of level of self-esteem?
a. +.60
b. +.01
c. –.10
d. –.06
18. When we ask, for example, how closely related are the intelligence scores of fraternal twins, we
are asking how strongly two are related.
a. experimental groups
b. control groups
c. variables
d. scatterplots
19. When you read a bar graph, it is most important for you to
a. mentally transform the data into a normal curve.
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