Quiz: Experimental Research
Methods, Participants, Internal
Validity
Question 1
1/ 1pts
The two main sampling techniques that researchers use are _____________
sampling and _____________ sampling.
probability, population
population, quota
probability, nonprobability
quota, nonprobability
IncorrectQuestion 2
0/ 1pts
When two population overlap minimally on a dependent variable, they are
said to have a(n) _____________ effect size.
small
large
medium
average
Question 3
1/ 1pts
Which of the following isnotone of the types of probability sampling
procedures?
simple
snowballing
systematic
stratified
Question 4
1/ 1pts
Stefani has identified several subgroups of individuals from the population
she is studying. Stefani plans on randomly sampling participants from each
of these subgroups. Stefani is using _____________ probability sampling.
simple
snowball
stratified
systematic
Question 5
1/ 1pts
The amount of overlap between populations being studied is called
_____________.
power
sample size
population density
effect size
Question 6
1/ 1pts
A sample in which not everyone in the population has an equal or known
chance of being selected is called a _____________ sample.
cluster
probability
biased
simple
Question 7
1/ 1pts
Aaron has just finished collecting data for his study. He has a total of 85
participants. The number of participants in his study is known as the
_____________.
population collective
data sample
sample roast
sample size
Question 8
1/ 1pts
Which of the following methods could be used in a simple probability
sampling procedure?
placing people into groups as they enter an experiment
systematically separating the males from the females
using a random number table to put participants in groups
identifying participants before the experiment starts
Question 9
1/ 1pts
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
Question 10
1/ 1pts
Have you ever played a video game breaking the all-time high score only to
find that you were never able to duplicate that performance? This is an
example of _________, which is a threat to internal validity.
history
maturation
regression to the mean
selection
Question 11
1/ 1pts
_________ variables are not controlled for in the experiment but may have an
influence on the dependent variable because they vary with the levels of the
independent variables.
Extraneous
Bothersome
Attrition
History
Question 12
1/ 1pts
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
Question 13
1/ 1pts
Which of the following is an accurate statement regarding the differences
between extraneous and nuisance variables?
Nuisance variables vary with the independent variable and extraneous
variables are the same for all groups of participants.
Extraneous variables vary with the independent variable and nuisance
variables are the same for all groups of participants.
Nuisance variables focus on issues related to the experimental design and
extraneous variables focus on issues related to participants.
Extraneous variables are not manipulated by researchers but nuisance
variables are.
Question 14
1/ 1pts
You have just learned of survey results conducted by your university on the
drinking behaviors of the college campus. Wondering about the results, you
ask yourself the following questions: how were participants selected, were
participants selected depending on if they lived on or off campus, were all
the participants in a sorority or fraternity, were non–traditional age students
included in the survey, and were men and women equally sampled? These
types of questions indicate that you are concerned about what threat to
internal validity?
history
selection
maturation
regression to the mean
Question 15
1/ 1pts
When a change in the dependent variable could be due to the participant’s
expectation that change will occur, __________ is a threat to internal validity.
diffusion of treatments
instrumentation
placebo effect
demand characteristics
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