Quiz 10 Research in Psychology

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Quiz 10Research in Psychology
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1. An hypothesis is _____.

• one of the final stages of an experiment
• a fact that has been tested and proven
  scientifically
• a statement about the relationship between two or
  more variables
• both b and c

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2. Dr. Feldsein asked his four students to
explain what a theory is. Which of them gave the
best answer?

• Elaine A theory is an educated guess that is
  derived from a hypothesis.
• Jerry A theory is the operational definition of
  a hypothesis.
• George A theory explains how two or more
  observations are related.
• Cosmo A theory explains how a hypothesis and an
  operational definition are related.

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3. Independent variable is to dependent
variable, as _____ is to _____.

• confounding, extraneous
• operational, random
• manipulated, measured
• theory, hypothesis

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4. Random assignment is used to control for
possible _____ variables.

• dependent
• independent
• extraneous
• operational

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5. Which of the following phrases describes
an experiment rather than a correlational/descript
ive research method?

• random assignment of subjects
• control of extraneous variables
• careful control of the laboratory environment
• all of the above
• naturalistic observation

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6. From which of the following types of
research methods can a psychologist infer a
cause-and-effect relationship between variables?

• survey
• case study
• experiment
• naturalistic observation
• None of the above

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7. Which of the following combinations is
correct?

• case study ? control group
• correlational ? cause-and-effect
• experiment ? independent variable
• naturalistic observation ? laboratory

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8. Which of the following is a type of
descriptive statistic?

• measures of central tendency (i.e., the mean,
  median, and mode)
• measures of variability (i.e., the standard
  deviation)
• measure of the relationship between variables
  (i.e., the correlation coefficient)
• all of the above

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9. The correlation coefficient allows a
researcher to determine the _____ of the
relationship between two variable?

• strength
• direction
• cause
• both a and b

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10. In an experiment, what variables will
affect the dependent variable?

• independent
• extraneous
• Both of the above
• Neither of the above