, TEST BANK: EVIDENCE-BASED PRACTICE IN NURSING &
HEALTHCARE (EXAM FOCUSED -MASTERPIECE ) CONTAINS A
MIXTURE OF THE MANY CHAPTERS AVAILABLE IN FORM OF
QUESTIONS AND RESPONSES|2026 UPDATE|<VERIFIED AND
100% CORRECT>
1.
A nurse researcher is developing a clinical question to evaluate whether early mobility reduces ICU delirium. Which
of the following best represents a properly constructed PICO framework question?
A. Does early mobility help ICU patients?
B. In critically ill adults, how does early mobility affect outcomes?
C. In ICU patients (P), how does early mobility (I) compared to standard care (C) affect delirium incidence
(O)?
D. What interventions reduce ICU delirium?
Correct Answer: C
Rationale:
The PICO format requires clearly defined Population, Intervention, Comparison, and Outcome. Option C is the
only structured and specific question that enables targeted literature searching and appraisal.
• A and D are too vague
• B lacks comparison and outcome clarity
2.
A nurse evaluates multiple studies and notices inconsistent findings. Which factor most likely explains variability in
results?
A. Identical sample populations
B. Differences in study design and methodology
C. Use of randomized controlled trials only
D. Consistent measurement tools
Correct Answer: B
Rationale:
Variability in results often stems from heterogeneity in study design, sampling, interventions, and measurement
tools. This affects comparability and synthesis.
• A and D would reduce variability
• C typically increases internal validity
3.
,Which level of evidence provides the strongest support for clinical decision-making?
A. Expert opinion
B. Case reports
C. Systematic reviews and meta-analyses
D. Descriptive studies
Correct Answer: C
Rationale:
At the top of the evidence hierarchy are systematic reviews and meta-analyses, which synthesize multiple high-
quality studies to provide robust conclusions.
4.
A nurse appraises a randomized controlled trial (RCT). Which characteristic best reflects internal validity?
A. Generalizability to other populations
B. Absence of bias and confounding variables
C. Large sample size only
D. Use of qualitative data
Correct Answer: B
Rationale:
Internal validity refers to the accuracy of cause-and-effect relationships within a study, requiring control of bias
and confounders.
5.
A study reports a p-value of 0.08. How should the nurse interpret this finding?
A. Strong statistical significance
B. No clinical relevance
C. Not statistically significant at α = 0.05
D. Proof of intervention effectiveness
Correct Answer: C
Rationale:
A p-value > 0.05 indicates the result is not statistically significant, meaning the null hypothesis cannot be rejected.
6.
Which database is most appropriate for locating nursing-specific research evidence?
A. PubMed
B. CINAHL
C. Google Scholar
D. Scopus
Correct Answer: B
, Rationale:
CINAHL is specifically tailored to nursing and allied health literature, making it the most relevant source for EBP
in nursing.
7.
Which sampling method best reduces selection bias?
A. Convenience sampling
B. Purposive sampling
C. Random sampling
D. Snowball sampling
Correct Answer: C
Rationale:
Random sampling ensures each member of the population has an equal chance of selection, minimizing bias and
improving representativeness.
8.
A nurse implements a new protocol based on evidence. Which step of EBP is being demonstrated?
A. Ask
B. Acquire
C. Apply
D. Appraise
Correct Answer: C
Rationale:
The Apply step involves integrating evidence into clinical practice, alongside clinical expertise and patient
preferences.
9.
Which outcome best reflects clinical significance rather than statistical significance?
A. p-value < 0.05
B. Large sample size
C. Meaningful improvement in patient quality of life
D. Narrow confidence interval
Correct Answer: C
Rationale:
Clinical significance focuses on real-world impact on patient outcomes, not just statistical calculations.
10.
Which bias occurs when participants alter behavior because they know they are being studied?
HEALTHCARE (EXAM FOCUSED -MASTERPIECE ) CONTAINS A
MIXTURE OF THE MANY CHAPTERS AVAILABLE IN FORM OF
QUESTIONS AND RESPONSES|2026 UPDATE|<VERIFIED AND
100% CORRECT>
1.
A nurse researcher is developing a clinical question to evaluate whether early mobility reduces ICU delirium. Which
of the following best represents a properly constructed PICO framework question?
A. Does early mobility help ICU patients?
B. In critically ill adults, how does early mobility affect outcomes?
C. In ICU patients (P), how does early mobility (I) compared to standard care (C) affect delirium incidence
(O)?
D. What interventions reduce ICU delirium?
Correct Answer: C
Rationale:
The PICO format requires clearly defined Population, Intervention, Comparison, and Outcome. Option C is the
only structured and specific question that enables targeted literature searching and appraisal.
• A and D are too vague
• B lacks comparison and outcome clarity
2.
A nurse evaluates multiple studies and notices inconsistent findings. Which factor most likely explains variability in
results?
A. Identical sample populations
B. Differences in study design and methodology
C. Use of randomized controlled trials only
D. Consistent measurement tools
Correct Answer: B
Rationale:
Variability in results often stems from heterogeneity in study design, sampling, interventions, and measurement
tools. This affects comparability and synthesis.
• A and D would reduce variability
• C typically increases internal validity
3.
,Which level of evidence provides the strongest support for clinical decision-making?
A. Expert opinion
B. Case reports
C. Systematic reviews and meta-analyses
D. Descriptive studies
Correct Answer: C
Rationale:
At the top of the evidence hierarchy are systematic reviews and meta-analyses, which synthesize multiple high-
quality studies to provide robust conclusions.
4.
A nurse appraises a randomized controlled trial (RCT). Which characteristic best reflects internal validity?
A. Generalizability to other populations
B. Absence of bias and confounding variables
C. Large sample size only
D. Use of qualitative data
Correct Answer: B
Rationale:
Internal validity refers to the accuracy of cause-and-effect relationships within a study, requiring control of bias
and confounders.
5.
A study reports a p-value of 0.08. How should the nurse interpret this finding?
A. Strong statistical significance
B. No clinical relevance
C. Not statistically significant at α = 0.05
D. Proof of intervention effectiveness
Correct Answer: C
Rationale:
A p-value > 0.05 indicates the result is not statistically significant, meaning the null hypothesis cannot be rejected.
6.
Which database is most appropriate for locating nursing-specific research evidence?
A. PubMed
B. CINAHL
C. Google Scholar
D. Scopus
Correct Answer: B
, Rationale:
CINAHL is specifically tailored to nursing and allied health literature, making it the most relevant source for EBP
in nursing.
7.
Which sampling method best reduces selection bias?
A. Convenience sampling
B. Purposive sampling
C. Random sampling
D. Snowball sampling
Correct Answer: C
Rationale:
Random sampling ensures each member of the population has an equal chance of selection, minimizing bias and
improving representativeness.
8.
A nurse implements a new protocol based on evidence. Which step of EBP is being demonstrated?
A. Ask
B. Acquire
C. Apply
D. Appraise
Correct Answer: C
Rationale:
The Apply step involves integrating evidence into clinical practice, alongside clinical expertise and patient
preferences.
9.
Which outcome best reflects clinical significance rather than statistical significance?
A. p-value < 0.05
B. Large sample size
C. Meaningful improvement in patient quality of life
D. Narrow confidence interval
Correct Answer: C
Rationale:
Clinical significance focuses on real-world impact on patient outcomes, not just statistical calculations.
10.
Which bias occurs when participants alter behavior because they know they are being studied?
