NURS 5366 Module 2 Quiz – Questions and Answers
1. In the following purpose statement, what kind of variable is number of days
absent from class?
The purpose of this study was to examine the effects of a generous weekly allowance
and twice-weekly text messages from parents on number of days a...
what kind of variable is number of days absent from class the purpose of this study was to examine the effects o
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NURS 5366 Module 2 Quiz – Questions and Answers
1. In the following purpose statement, what kind of variable is number of days
absent from class?
The purpose of this study was to examine the effects of a generous weekly allowance
and twice-weekly text messages from parents on number of days absent from class, in
freshman college students.
Answers:
a. Dependent variable
b. Extraneous variable
c. Independent variable
Response Feedback:
A dependent variable is the response behavior, or outcome that the researcher wants to
predict or explain. In this example, number of days absent from class is the dependent
variable. An independent variable is a stimulus or activity that is manipulated or varied
by the researcher to create an effect on the dependent variable. The independent
variable is also called an intervention, treatment, or experimental variable.
Demographic variables are attributes of the subjects that are measured during the study
and used to describe the sample. Extraneous variables exist in all studies and can affect
the measurement of study variables and the relationships among them.
2. The report of a research study on a new medication to treat hypertension
included this statement: “There was no significant difference in gender or age
between the treatment and control groups.” Based on the statement, the reader of
the report recognizes that gender and age were
Answers:
a. confounding variables
b. demographic variables
c. Environmental variables
d. moderator variables
Response Feedback:
, Age and Gender are demographic variables
3. A researcher wishes to conduct a correlational study to determine whether there
is a relationship between stress levels and relapse rates among patients who have
chronic conditions. In order to determine the existence of a relationship between
these two variables, the researcher will attempt to:
Answers:
a. manipulate the level of stress in study subjects.
b. provide lengthy descriptions of subject's behaviors.
c. randomly assign subjects to groups
d. obtain a large range of possible scores.
4. A study’s hypothesis that a new surgical approach produces safer outcomes in
immunosuppressed patients is tested in a fourteen-site research study across the
United States. Subjects at all sites are randomly selected and randomly assigned
to experimental versus control groups. What study design is used in this research
project?
Answers:
a. Model testing design
b. Counterbalanced design
c. Randomized controlled trial
d. Quasi-experimental design
Response Feedback:
A randomized clinical trial (RCT) contains random assignment to experimental and
clinical groups and very often is multi-site. A fully randomized design contains both
random selection and random assignment. Quasi-experimental designs facilitate the
search for knowledge and examination of causality in situations in which complete
control is not possible.
Such designs lack a control group, or lack random assignment to group. The model-
testing design requires that all variables relevant to the model be measured, using
correlational statistics. A large, heterogeneous sample is required. Crossover, or
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