NR 449 / NR-449 Evidence-Based
Practice Exam Questions And Well
Graded Solutions With Rationales
Updated 2026-2027 | Chamberlain
University
Ace your Chamberlain NR-449 Evidence-Based Practice exam with this comprehensive study
bank. Features real-style multiple-choice questions covering the PICO(T) framework,
quantitative vs. qualitative research methodologies, IRB ethical principles, and biostatistics.
Every question includes a bolded correct answer and a detailed rationale to ensure total
concept mastery. Perfect for weekly quizzes, RUAs, and the CJE Benchmark exam. Download
now to boost your grades and save hours of study time!
Part 1: Introduction to Evidence-Based Practice & PICO(T)
(Questions 1–15)
1. Which component of EBP integrates clinical expertise, patient values, and the best
available research evidence?
A. Research utilization
B. Quality improvement
C. Evidence-based practice
D. Outcomes management
Rationale: Evidence-based practice (EBP) is explicitly defined as the integration of
best research evidence with clinical expertise and patient values to facilitate clinical
decision-making.
2. A nurse is drafting a PICO(T) question regarding the use of chlorhexidine versus
soap and water for central line care. What does the chlorhexidine represent?
A. Population
B. Intervention
C. Comparison
D. Outcome
Rationale: The intervention (I) is the specific treatment, therapy, or practice being
introduced or evaluated in the PICO(T) question.
3. In a PICO(T) question addressing the reduction of fall rates among hospitalized
geriatric patients, "hospitalized geriatric patients" represents which component?
A. Population
B. Intervention
C. Comparison
D. Outcome
Rationale: The population (P) identifies the specific group of patients, clients, or
communities that the clinical question is targeting.
4. Which element is considered the gold standard source of evidence for making
clinical practice changes?
A. Single descriptive studies
B. Expert opinion reports
C. Systematic reviews of RCTs
1|Page
, D. Qualitative phenomenological studies
Rationale: Systematic reviews and meta-analyses of Randomized Controlled Trials
(RCTs) sit at the pinnacle of the evidence hierarchy (Level I) due to their rigorous
minimization of bias.
5. Why is the "T" (Timeframe) element in a PICO(T) question highly valuable when
designing a clinical intervention study?
A. It determines the study budget.
B. It defines the period needed to observe the outcome.
C. It designates the publication deadline.
D. It dictates the IRB application speed.
Rationale: Timeframe (T) clarifies the duration over which the intervention's effects or
outcomes are expected to manifest and be assessed.
6. What is the fundamental difference between Research Utilization (RU) and
Evidence-Based Practice (EBP)?
A. RU requires a much larger budget than EBP.
B. RU focuses on implementing a single study's findings, while EBP
synthesizes multiple forms of evidence.
C. EBP relies purely on quantitative laboratory data.
D. RU does not require any critical appraisal steps.
Rationale: Research utilization is narrow, focusing on transferring a single research
study's findings into practice, whereas EBP synthesizes comprehensive clinical
research, patient values, and expertise.
7. A nurse reads an expert opinion article regarding a new wound care dressing.
According to the traditional hierarchy of evidence, what level does this represent?
A. Level I
B. Level III
C. Level V
D. Level VII
Rationale: Opinion papers from experts, authorities, or consensus panels represent
the lowest tier of evidence (Level VII) because they lack formal, empirical testing.
8. Which database is universally recognized as the most comprehensive resource for
locating nursing-specific literature and evidence-based articles?
A. PubMed
B. CINAHL
C. Cochrane Database
D. PsycINFO
Rationale: The Cumulative Index to Nursing and Allied Health Literature (CINAHL) is
the premier database dedicated strictly to nursing and allied health professions.
9. When using Boolean operators to search a database for "diabetes AND obesity,"
how does the operator "AND" affect the search results?
A. It expands the search to include either term.
B. It narrows the search to retrieve articles containing both terms.
C. It excludes articles containing the word obesity.
D. It organizes the articles alphabetically by author.
Rationale: The Boolean operator "AND" restricts search parameters by requiring that
all connected search terms be present within the retrieved articles.
10. A nurse researcher wants to find articles that contain variations of a word, such as
"prevent," "prevention," and "preventing." Which search strategy should be applied?
A. Subject headings
B. Boolean nesting
2|Page
, C. Truncation using a symbol like * or $
D. Boolean exclusion using NOT
Rationale: Truncation involves placing a symbol (like an asterisk) at the root of a
word to capture all possible endings and variations during a literature search.
11. What is the main objective of the "Comparison" element within a PICO(T)
framework?
A. To identify the demographic limits of the patient population.
B. To contrast the new intervention against current standard care or no
treatment.
C. To measure the financial overhead of a clinical trial.
D. To establish a theoretical nursing framework.
Rationale: The comparison (C) element identifies the standard of care, alternative
treatment, or placebo used to measure the efficacy of the proposed intervention.
12. A clinical nursing team notes an increase in catheter-associated urinary tract
infections (CAUTIs). Which step of the EBP process should they initiate first?
A. Search for the best external evidence.
B. Cultivate a spirit of inquiry and formulate a clinical question.
C. Critically appraise the gathered literature.
D. Integrate evidence with clinical expertise.
Rationale: The absolute initial step (Step 0) of the EBP process is fostering a spirit of
inquiry, followed directly by forming a searchable clinical question (Step 1).
13. Which organization is globally celebrated for producing high-quality systematic
reviews that synthesize the results of multiple randomized controlled trials?
A. American Nurses Association
B. Sigma Theta Tau International
C. The Cochrane Collaboration
D. National Institutes of Health
Rationale: The Cochrane Collaboration produces systematic reviews that are
universally respected as gold-standard secondary resources for evidence-based
healthcare.
14. In a PICO(T) question, what does the "O" represent?
A. Objective study design
B. Operational costs
C. Outcome of interest
D. Observation methods
Rationale: The outcome (O) describes the measurable effect, result, or improvement
the nurse expects to see following the implementation of the intervention.
15. What type of evidence question is best answered using a qualitative research
design?
A. "What is the correlation between age and medication adherence?"
B. "What is the lived experience of mothers coping with postpartum
depression?"
C. "Does drug X reduce systolic blood pressure more than drug Y?"
D. "What is the incidence rate of pressure ulcers in long-term care?"
Rationale: Qualitative questions focus on understanding human experiences,
meanings, and perceptions, which are perfectly explored via methods like
phenomenological inquiry.
3|Page
, Part 2: Research Designs & Quantitative Methodologies
(Questions 16–35)
16. What is the defining characteristic of a true experimental research design?
A. Use of a convenience sample
B. Random assignment of participants to groups
C. Lack of an intervention or independent variable
D. Evaluation of qualitative data transcripts
Rationale: True experimental designs must feature three strict elements:
manipulation of an independent variable, presence of a control group, and random
assignment.
17. A study measures the relationship between two variables without manipulating either
one. What type of quantitative design is this?
A. Experimental
B. Quasi-experimental
C. Correlational
D. Phenomenological
Rationale: Correlational designs examine the statistical relationships or associations
between variables as they naturally exist, without any experimental intervention or
manipulation.
18. A researcher tests a new teaching method on a single unit and compares pre-test
and post-test scores. Participants were not randomly assigned to groups. What
design is this?
A. True experimental
B. Quasi-experimental
C. Descriptive non-experimental
D. Grounded theory
Rationale: Quasi-experimental studies feature an intervention but lack a crucial
control element, most commonly lacking random assignment of the participants.
19. In a study evaluating the impact of exercise on blood glucose levels, what type of
variable is the blood glucose level?
A. Independent variable
B. Extraneous variable
C. Dependent variable
D. Confounding variable
Rationale: The dependent variable is the outcome of interest that changes in
response to the manipulation of the independent variable (exercise).
20. A researcher wants to avoid extraneous variables from distorting the study results.
What method can help ensure these variables are distributed equally across groups?
A. Reducing sample size
B. Randomization of participants
C. Using a convenience sampling approach
D. Performing qualitative coding
Rationale: Randomization helps ensure that extraneous or confounding participant
characteristics are distributed equally across both experimental and control groups.
21. What is the primary purpose of a control group in an experimental study?
A. To guarantee that all study participants finish the trial.
B. To provide a cohort that receives twice the experimental treatment dosage.
C. To provide a baseline against which the effects of the intervention can be
4|Page
Practice Exam Questions And Well
Graded Solutions With Rationales
Updated 2026-2027 | Chamberlain
University
Ace your Chamberlain NR-449 Evidence-Based Practice exam with this comprehensive study
bank. Features real-style multiple-choice questions covering the PICO(T) framework,
quantitative vs. qualitative research methodologies, IRB ethical principles, and biostatistics.
Every question includes a bolded correct answer and a detailed rationale to ensure total
concept mastery. Perfect for weekly quizzes, RUAs, and the CJE Benchmark exam. Download
now to boost your grades and save hours of study time!
Part 1: Introduction to Evidence-Based Practice & PICO(T)
(Questions 1–15)
1. Which component of EBP integrates clinical expertise, patient values, and the best
available research evidence?
A. Research utilization
B. Quality improvement
C. Evidence-based practice
D. Outcomes management
Rationale: Evidence-based practice (EBP) is explicitly defined as the integration of
best research evidence with clinical expertise and patient values to facilitate clinical
decision-making.
2. A nurse is drafting a PICO(T) question regarding the use of chlorhexidine versus
soap and water for central line care. What does the chlorhexidine represent?
A. Population
B. Intervention
C. Comparison
D. Outcome
Rationale: The intervention (I) is the specific treatment, therapy, or practice being
introduced or evaluated in the PICO(T) question.
3. In a PICO(T) question addressing the reduction of fall rates among hospitalized
geriatric patients, "hospitalized geriatric patients" represents which component?
A. Population
B. Intervention
C. Comparison
D. Outcome
Rationale: The population (P) identifies the specific group of patients, clients, or
communities that the clinical question is targeting.
4. Which element is considered the gold standard source of evidence for making
clinical practice changes?
A. Single descriptive studies
B. Expert opinion reports
C. Systematic reviews of RCTs
1|Page
, D. Qualitative phenomenological studies
Rationale: Systematic reviews and meta-analyses of Randomized Controlled Trials
(RCTs) sit at the pinnacle of the evidence hierarchy (Level I) due to their rigorous
minimization of bias.
5. Why is the "T" (Timeframe) element in a PICO(T) question highly valuable when
designing a clinical intervention study?
A. It determines the study budget.
B. It defines the period needed to observe the outcome.
C. It designates the publication deadline.
D. It dictates the IRB application speed.
Rationale: Timeframe (T) clarifies the duration over which the intervention's effects or
outcomes are expected to manifest and be assessed.
6. What is the fundamental difference between Research Utilization (RU) and
Evidence-Based Practice (EBP)?
A. RU requires a much larger budget than EBP.
B. RU focuses on implementing a single study's findings, while EBP
synthesizes multiple forms of evidence.
C. EBP relies purely on quantitative laboratory data.
D. RU does not require any critical appraisal steps.
Rationale: Research utilization is narrow, focusing on transferring a single research
study's findings into practice, whereas EBP synthesizes comprehensive clinical
research, patient values, and expertise.
7. A nurse reads an expert opinion article regarding a new wound care dressing.
According to the traditional hierarchy of evidence, what level does this represent?
A. Level I
B. Level III
C. Level V
D. Level VII
Rationale: Opinion papers from experts, authorities, or consensus panels represent
the lowest tier of evidence (Level VII) because they lack formal, empirical testing.
8. Which database is universally recognized as the most comprehensive resource for
locating nursing-specific literature and evidence-based articles?
A. PubMed
B. CINAHL
C. Cochrane Database
D. PsycINFO
Rationale: The Cumulative Index to Nursing and Allied Health Literature (CINAHL) is
the premier database dedicated strictly to nursing and allied health professions.
9. When using Boolean operators to search a database for "diabetes AND obesity,"
how does the operator "AND" affect the search results?
A. It expands the search to include either term.
B. It narrows the search to retrieve articles containing both terms.
C. It excludes articles containing the word obesity.
D. It organizes the articles alphabetically by author.
Rationale: The Boolean operator "AND" restricts search parameters by requiring that
all connected search terms be present within the retrieved articles.
10. A nurse researcher wants to find articles that contain variations of a word, such as
"prevent," "prevention," and "preventing." Which search strategy should be applied?
A. Subject headings
B. Boolean nesting
2|Page
, C. Truncation using a symbol like * or $
D. Boolean exclusion using NOT
Rationale: Truncation involves placing a symbol (like an asterisk) at the root of a
word to capture all possible endings and variations during a literature search.
11. What is the main objective of the "Comparison" element within a PICO(T)
framework?
A. To identify the demographic limits of the patient population.
B. To contrast the new intervention against current standard care or no
treatment.
C. To measure the financial overhead of a clinical trial.
D. To establish a theoretical nursing framework.
Rationale: The comparison (C) element identifies the standard of care, alternative
treatment, or placebo used to measure the efficacy of the proposed intervention.
12. A clinical nursing team notes an increase in catheter-associated urinary tract
infections (CAUTIs). Which step of the EBP process should they initiate first?
A. Search for the best external evidence.
B. Cultivate a spirit of inquiry and formulate a clinical question.
C. Critically appraise the gathered literature.
D. Integrate evidence with clinical expertise.
Rationale: The absolute initial step (Step 0) of the EBP process is fostering a spirit of
inquiry, followed directly by forming a searchable clinical question (Step 1).
13. Which organization is globally celebrated for producing high-quality systematic
reviews that synthesize the results of multiple randomized controlled trials?
A. American Nurses Association
B. Sigma Theta Tau International
C. The Cochrane Collaboration
D. National Institutes of Health
Rationale: The Cochrane Collaboration produces systematic reviews that are
universally respected as gold-standard secondary resources for evidence-based
healthcare.
14. In a PICO(T) question, what does the "O" represent?
A. Objective study design
B. Operational costs
C. Outcome of interest
D. Observation methods
Rationale: The outcome (O) describes the measurable effect, result, or improvement
the nurse expects to see following the implementation of the intervention.
15. What type of evidence question is best answered using a qualitative research
design?
A. "What is the correlation between age and medication adherence?"
B. "What is the lived experience of mothers coping with postpartum
depression?"
C. "Does drug X reduce systolic blood pressure more than drug Y?"
D. "What is the incidence rate of pressure ulcers in long-term care?"
Rationale: Qualitative questions focus on understanding human experiences,
meanings, and perceptions, which are perfectly explored via methods like
phenomenological inquiry.
3|Page
, Part 2: Research Designs & Quantitative Methodologies
(Questions 16–35)
16. What is the defining characteristic of a true experimental research design?
A. Use of a convenience sample
B. Random assignment of participants to groups
C. Lack of an intervention or independent variable
D. Evaluation of qualitative data transcripts
Rationale: True experimental designs must feature three strict elements:
manipulation of an independent variable, presence of a control group, and random
assignment.
17. A study measures the relationship between two variables without manipulating either
one. What type of quantitative design is this?
A. Experimental
B. Quasi-experimental
C. Correlational
D. Phenomenological
Rationale: Correlational designs examine the statistical relationships or associations
between variables as they naturally exist, without any experimental intervention or
manipulation.
18. A researcher tests a new teaching method on a single unit and compares pre-test
and post-test scores. Participants were not randomly assigned to groups. What
design is this?
A. True experimental
B. Quasi-experimental
C. Descriptive non-experimental
D. Grounded theory
Rationale: Quasi-experimental studies feature an intervention but lack a crucial
control element, most commonly lacking random assignment of the participants.
19. In a study evaluating the impact of exercise on blood glucose levels, what type of
variable is the blood glucose level?
A. Independent variable
B. Extraneous variable
C. Dependent variable
D. Confounding variable
Rationale: The dependent variable is the outcome of interest that changes in
response to the manipulation of the independent variable (exercise).
20. A researcher wants to avoid extraneous variables from distorting the study results.
What method can help ensure these variables are distributed equally across groups?
A. Reducing sample size
B. Randomization of participants
C. Using a convenience sampling approach
D. Performing qualitative coding
Rationale: Randomization helps ensure that extraneous or confounding participant
characteristics are distributed equally across both experimental and control groups.
21. What is the primary purpose of a control group in an experimental study?
A. To guarantee that all study participants finish the trial.
B. To provide a cohort that receives twice the experimental treatment dosage.
C. To provide a baseline against which the effects of the intervention can be
4|Page
