Nurse Executive Test Research & Evidence-Based Practice 4 — Questions and Answers
Question 1: A nurse executive is leading a quality improvement (QI) project. How does QI differ MOST fundamentally from nursing research?
- QI requires IRB approval; research does not
- QI aims to improve local processes; research aims to generate generalizable knowledge (Correct answer)
- QI uses quantitative methods; research uses qualitative methods only
- QI is exempt from ethical oversight; research is not
Correct answer: QI aims to improve local processes; research aims to generate generalizable knowledge
QI projects focus on improving performance within a specific setting, while research is designed to produce generalizable new knowledge.
Question 2: Which type of sampling method gives every member of a population an equal chance of being selected and produces the MOST generalizable results?
- Convenience sampling
- Purposive sampling
- Simple random sampling (Correct answer)
- Snowball sampling
Correct answer: Simple random sampling
Simple random sampling minimizes selection bias by giving each population member an equal probability of inclusion, maximizing generalizability.
Question 3: A nurse executive reviews a study that found a strong correlation (r = 0.85) between nurse staffing ratios and patient fall rates. What conclusion is MOST appropriate?
- Lower staffing ratios cause more falls
- There is a strong positive association, but causation cannot be inferred from correlation alone (Correct answer)
- The study's findings should immediately change staffing policy
- The r value indicates that staffing explains 85% of fall variance
Correct answer: There is a strong positive association, but causation cannot be inferred from correlation alone
Correlation indicates the strength and direction of a relationship but does not establish causation; r = 0.85 means r² = 0.72, not 0.85, of variance explained.
Question 4: When conducting a focus group to explore nurse perceptions of a new EHR system, which sampling approach is MOST appropriate?
- Random sampling from the full staff roster
- Purposive sampling to include varied roles and experience levels (Correct answer)
- Systematic sampling every 5th employee on the list
- Stratified random sampling by shift
Correct answer: Purposive sampling to include varied roles and experience levels
Purposive sampling ensures that participants are selected intentionally to represent diverse perspectives relevant to the research question.
Question 5: A nurse executive is reviewing a new guideline and notes the recommendation is rated 'Grade B.' This MOST likely means:
- Evidence is from expert consensus only
- Evidence is from at least one well-designed RCT
- Evidence supports the recommendation but is not derived from the highest-quality studies (Correct answer)
- The recommendation is based on anecdotal case reports
Correct answer: Evidence supports the recommendation but is not derived from the highest-quality studies
Grade B recommendations are generally based on good but not the highest-level evidence, such as well-designed non-randomized studies or consistent observational data.
Question 6: In a meta-analysis, what does a forest plot primarily display?
- The geographic distribution of study populations
- Individual study effect sizes and confidence intervals alongside the pooled estimate (Correct answer)
- The qualitative themes identified across studies
- The risk of bias in each study's randomization method
Correct answer: Individual study effect sizes and confidence intervals alongside the pooled estimate
A forest plot visually presents each study's effect size with its confidence interval and a combined pooled estimate, typically as a diamond.
Question 7: A nurse executive wants to evaluate whether a new pressure injury prevention protocol should be adopted unit-wide. After a successful pilot, which action BEST supports sustainable implementation?
- Publish the findings in a nursing journal
- Integrate the protocol into orientation, policies, and audit cycles (Correct answer)
- Allow nurses to choose whether to follow the protocol
- Wait for a national guideline endorsement before implementing broadly
Correct answer: Integrate the protocol into orientation, policies, and audit cycles
Sustainable implementation requires embedding the change into onboarding, formal policy, and ongoing monitoring rather than relying on individual motivation.
Nurse Executive Test Research & Evidence-Based Practice 4
A nurse executive is leading a quality improvement (QI) project.
How does QI differ MOST fundamentally from nursing research?