Quiz: Experimental Research Methods, Participants,
Internal Validity
Due Sep 18 at 11:59pm Points 50 Questions 25 Time Limit 60 Minutes
Instructions
Attempt History
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LATEST Attempt 1 13 minutes 46 out of 50
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Score for this quiz: 46 out of 50
Submitted Sep 14 at 2:10pm
This attempt took 13 minutes.
The quiz:
Covers theLearnmaterial fromModule 4: Week 4.
Contains25 multiple-choicequestions.
Islimitedto1hour.
Allows1 attempt.
Isworth 50 points.
Submit this assignment by 11:59 p.m. (ET) on Monday of Module 4: Week 4.
2 / 2 pts
Question 1
In order to combat any threats to internal validity during sampling
procedures, researchers should use _____________.
external validity
systematic sampling
roasted sampling
random assignment
Sign In
2 / 2 pts
Question 2
Which of the following methods could be used in a simple probability
sampling procedure?
pulling names of potential participants from a hat
placing people into groups as they enter an experiment
systematically separating the males from the females
identifying participants before the experiment starts
2 / 2 pts
Question 3
When placing participants into conditions or groups for a study,
researchers should use _____________ to ensure each participant has equal
probability of being placed into each group.
external validity
systematic sampling
random sampling
random assignment
2 / 2 pts
Question 4
The entire group of individuals in which you are interested in studying is
called the _____________.
sample
population
participant pool
experimental group
2 / 2 pts
Question 5
A nonprobability sampling procedure where participants are selected
based on their availability or willingness to participate is called a
_____________ sampling procedure.
simple
quota
cluster
convenience
2 / 2 pts
Question 6
Random sampling in which every k person is selected for participation in
a study is called _____________ sampling.
th
simple
systematic
stratied
snowball
2 / 2 pts
Question 7
Which of the following is not a type of nonprobability sampling procedure?
simple
convenience
quota
snowballing
0 / 2 pts
Question 8
Incorrect
Incorrect
Kelly is conducting a study on campus parking for her psychology class.
She begins her study by identifying naturally occurring groups of individuals
who park on campus. These include those who park in the north, south,
east, and west lots. She then sample participants from each of these
groups. Kelly is using _____________ probability sampling.
simple
stratied
systematic
cluster
2 / 2 pts
Question 9
Linda is conducting a survey to evaluate the eating habits of customers at
fast food restaurants. She knows that people eat at the restaurant for
breakfast, lunch, and dinner. Therefore, she plans to randomly sample
participants from each of these groups. This process is known as
_____________ probability sampling.
simple
stratied
systematic
quota
2 / 2 pts
Question 10
The amount of overlap between populations being studied is called
_____________.
power
sample size
population density
effect size
2 / 2 pts
Question 11
In order to secure participants for his study, Jason uses class rosters from
instructors. Jason selects every 5 person on the instructor’s class rosters
for participation in his experiment. Jason is using _____________ sampling.
th
simple
snowballing
systematic
stratied
2 / 2 pts
Question 12
In Kevin's study, he knows that each participant had an equal probability of
being placed into each of his conditions. Kevin must have used
_____________.
external validity
random assignment
systematic sampling
random sampling
2 / 2 pts
Question 13
Research should be designed to _________ for nuisance and extraneous
variables.
ignore
control
manipulate
review
0 / 2 pts
Question 14
Incorrect
Incorrect
Reect on the Are You Equipped Now? section at the end of chapter 9.
What if some of the participants dropped out of the experiment before the
end because it was not working to alleviate pain? This question is
associated with which of the following threats to internal validity?
selection
maturation
regression to the mean
attrition
2 / 2 pts
Question 15
__________ validity is condence in saying that the independent variable
caused the change in the dependent variable.
External
Internal
Construct
Face
2 / 2 pts
Question 16
When a change in the dependent variable could be due to an event
occurring sometime during the research study, and beyond the researcher’s
control, _________ is a threat to internal validity.
history
maturation
regression to the mean
selection
2 / 2 pts
Question 17
When a change in the dependent variable could be due to how participants
were picked or assigned to groups, __________ is a threat to internal validity.
history
maturation
regression to the mean
selection
2 / 2 pts
Question 18
If you and a friend watched an episode of Family Guy separately and
counted the number of violent acts, you are likely to get different counts.
Which threat to internal validity explains these results?
attrition
instrumentation
testing
diffusion of treatment
2 / 2 pts
Question 19
In a __________ study, the participant has no knowledge of which group he
or she has been assigned to, although the researcher knows.
single-blind
double-blind
hunting blind
mono-blind
2 / 2 pts
Question 20
Imagine a study where participants were given Jell-O shots to consume
before participating in experiments where reaction time was measured.
However, to the participants’ surprise, the Jell-O shots were not made with
alcohol. When the participants were debriefed and told that the Jell-O
contained no alcohol, some participants refused to drive home until they
had sobered up. The participants’ responses indicate that __________ was a
threat to internal validity.
diffusion of treatments
instrumentation
placebo effect
demand characteristics
2 / 2 pts
Question 21
When a change in the dependent variable could be due to internal changes
within the participant that occurred over time, __________ is a threat to
internal validity.
history
maturation
regression to the mean
selection
2 / 2 pts
Question 22
When a change in the dependent variable could be due to participants in
one group talking to participants in another group, __________ is a threat to
internal validity.
attrition
testing
diffusion of treatment
instrumentation
2 / 2 pts
Question 23
When a change in the dependent variable could be due to participants
systematically dropping out of an experiment, __________ is a threat to
internal validity.
attrition
testing
diffusion of treatment
instrumentation
2 / 2 pts
Question 24
Chapter 9 begins with an example regarding the TV show American Idol.
The format of the show allows viewers to watch performances and, after
hearing reviews of the judges, call in to vote for their favorite performer.
The judges providing feedback before viewers vote could be a problem
because __________.
it takes too long and viewers turn off TV before voting
the judges give opinions that upset the viewing audience
the judges give opinions that could inuence the results
the judges’ differing opinions could confuse the voters
2 / 2 pts
Question 25
When a change in the dependent variable could be due to the researcher
somehow letting the participant know how s/he (the researcher) wants the
participant to respond, or somehow the participant comes up with an idea
as to how s/he (the participant) should respond, __________ is a threat to
internal validity.
diffusion of treatments
instrumentation
placebo effect
demand characteristics
Quiz Score: 46 out of 50
