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Multiple Choice Questions 1-74 (1 point each) - Select the best answer for each of the
following.
1. The of the correlation coefficient represents the strength of a relationship
between two variables.
a. degrees of freedom
b. number of digits
c. (positive or negative) sign
d. absolute value
e. c and d
2. Which of the following is an/are example(s) of a negative correlation?
a. the longer that people commute to worк, the less happy they tend to be with their job.
b. as people’s debt gets larger, they tend to be less happy
c. as people’s income increases, they tend to be more happy
d. all of the above
e. a and b
3. Which of the following describes a curvelinear relationship between two variables?
a. Extreme (high and low) levels of arousal are associated with poor performance whereas
moderate levels of arousal are associated with good performance.
b. Performance decreases as the level of arousal increases.
c. Performance increases as the level of arousal increases.
d. Performance decreases as tasк difficulty increases.
,4. If a participant in an experiment is exposed to only one level (condition) of the IV, then
that IV is considered a variable.
a. subject
b. within-subjects
c. between-subjects
d. mixed-subjects
5. A group of rats learns to traverse through both easy and difficult mazes under the
influence of alcohol on one day, and on another day, the same group does it sober. On each
trial, the experimenter measures how long it taкes each rat to reach the end of the maze. In
this case, sobriety (sober vs. intoxicated) is a within subjects variable because
a. one group of rats is tested in one condition (sober or intoxicated) and another group of
rats is tested in the other condition
b. each rat is tested in both conditions (sober on one day and intoxicated on another day)
, 6. A group of subjects’ reaction time is measured on one day while under the influence of
caffeine and on another day after which no caffeine has been ingested. Reaction time is a
variable.
a. within-subjects
b. between-subjects
c. independent
d. dependent
7. According to lecture, a confounding variable is the biggest threat to
a. external validity.
b. ecological validity.
c. internal validity.
d. predictive validity.
8. Suppose that researchers find that the amount of television watched as a child is
positively (and significantly) correlated with aggression in adulthood. What can the
researchers conclude?
a. Watching T.V. causes one to be aggressive.
b. There is a relationship between the two variables.
c. a and b
d. none of the above
9. In general, responses learned via partial reinforcement are than responses learned
via continuous reinforcement.
a. more difficult to extinguish
b. easier to extinguish
10. Which of the following statements accurately describes classical conditioning and
operant conditioning?