Research Methods exam 2 practice Questions And Answers
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Course
N547
Institution
N547
A researcher selects one group of participants and observes them before and after a treatment meant to improve mood. What type of sampling design is described in this example? - ANS Pretest-posttest
The chi square test is used to analyze what type of data? - ANS categorical
What are the t...
Research Methods exam 2 practice
Questions And Answers
A researcher selects one group of participants and observes them before and after a treatment
meant to improve mood. What type of sampling design is described in this example? - ANS
Pretest-posttest
The chi square test is used to analyze what type of data? - ANS categorical
What are the three requirements for a between-subjects design to be an experimental research
design? - ANS randomization, manipulation, and comparison
The appropriate statistical test to evaluate the difference between the means of two groups
formed with random assignment is - ANS t test for independent samples
A method of sampling in which participants are selected for a research study based on how
easy it is to reach or access them and based on their availability to participate is called - ANS
convenience sampling.
Variables other than the independent variable that can cause changes in the difference between
groups are - ANS confounding variables
The strength of a correlation is indicated by - ANS the alpha level
On which axis do we list the names of the conditions in a bar or line graph? - ANS x-axis
A change or shift in a participant's performance toward a level or score that is closer or more
typical of his or her true potential or mean ability on some measure, after previously scoring
unusually high or low on the same measure, is called - ANS regression toward the mean
Placebo control groups and double-blind procedures typically are used to control for - ANS
demand characteristics and experimenter effects.
In hypothesis testing, a researcher can NEVER - ANS prove that his or her hypothesis is
correct
True experiments provide the greatest confidence that we have demonstrated a causal
relationship because - ANS we are confident of the temporal sequence between the cause and
its effect.
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