NURS 5366 Module 3 Exam V1 | NURS
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 3 Exam) | The University of Texas
at Arlington
1. A researcher is designing a study to test the effect of a new position protocol on the
incidence of pressure ulcers. Which element is essential for this study to be classified as a
true experimental design?
A. A large sample size of at least 100 participants
B. The use of a convenience sampling method
C. Random assignment of participants to groups
D. A qualitative component for participant feedback
Answer: C
Rationale: A true experimental design must include manipulation of the independent
variable, control, and Random assignment of participants to groups. Randomization helps
ensure that the groups are equivalent at the start of the study. This process minimizes
selection bias and strengthens the researcher’s ability to claim a cause-and-effect
relationship.
,2. When a researcher cannot randomly assign participants to the intervention or control
group due to ethical or practical reasons, which design is most likely utilized?
A. Descriptive survey design
B. Phenomenological design
C. Quasi-experimental design
D. Randomized Controlled Trial
Answer: C
Rationale: A Quasi-experimental design is used when there is manipulation of an
independent variable but no random assignment. This design is common in clinical nursing
research where existing units or groups must be used. It provides a level of control but is
considered less rigorous than a true experiment in establishing causality.
3. In a study investigating the relationship between nurse-to-patient ratios and patient fall
rates without manipulating any variables, the researcher is using which design?
A. Experimental design
B. Quasi-experimental design
C. Grounded theory design
D. Correlational design
Answer: D
, Rationale: A Correlational design examines the relationships or associations between
variables without intervention or manipulation. The researcher observes the variables as
they exist naturally to determine the direction and strength of the relationship. This design
does not allow the researcher to prove that one variable causes the other.
4. Which threat to internal validity occurs when an external event happens during the study
that influences the participants’ responses?
A. Maturation
B. Selection bias
C. History
D. Mortality
Answer: C
Rationale: The threat of History refers to specific events that occur outside the
experimental treatment but during the course of the study. These events can significantly
alter the dependent variable and confound the results. It is particularly problematic in
longitudinal studies where many external factors can interfere over time.
5. A researcher measures the pH level of a patient’s gastric secretions. Which level of
measurement does this represent?
A. Nominal
B. Ratio
C. Interval
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 3 Exam) | The University of Texas
at Arlington
1. A researcher is designing a study to test the effect of a new position protocol on the
incidence of pressure ulcers. Which element is essential for this study to be classified as a
true experimental design?
A. A large sample size of at least 100 participants
B. The use of a convenience sampling method
C. Random assignment of participants to groups
D. A qualitative component for participant feedback
Answer: C
Rationale: A true experimental design must include manipulation of the independent
variable, control, and Random assignment of participants to groups. Randomization helps
ensure that the groups are equivalent at the start of the study. This process minimizes
selection bias and strengthens the researcher’s ability to claim a cause-and-effect
relationship.
,2. When a researcher cannot randomly assign participants to the intervention or control
group due to ethical or practical reasons, which design is most likely utilized?
A. Descriptive survey design
B. Phenomenological design
C. Quasi-experimental design
D. Randomized Controlled Trial
Answer: C
Rationale: A Quasi-experimental design is used when there is manipulation of an
independent variable but no random assignment. This design is common in clinical nursing
research where existing units or groups must be used. It provides a level of control but is
considered less rigorous than a true experiment in establishing causality.
3. In a study investigating the relationship between nurse-to-patient ratios and patient fall
rates without manipulating any variables, the researcher is using which design?
A. Experimental design
B. Quasi-experimental design
C. Grounded theory design
D. Correlational design
Answer: D
, Rationale: A Correlational design examines the relationships or associations between
variables without intervention or manipulation. The researcher observes the variables as
they exist naturally to determine the direction and strength of the relationship. This design
does not allow the researcher to prove that one variable causes the other.
4. Which threat to internal validity occurs when an external event happens during the study
that influences the participants’ responses?
A. Maturation
B. Selection bias
C. History
D. Mortality
Answer: C
Rationale: The threat of History refers to specific events that occur outside the
experimental treatment but during the course of the study. These events can significantly
alter the dependent variable and confound the results. It is particularly problematic in
longitudinal studies where many external factors can interfere over time.
5. A researcher measures the pH level of a patient’s gastric secretions. Which level of
measurement does this represent?
A. Nominal
B. Ratio
C. Interval
