A researcher is assessing the reliability of a new instrument that was constructed to measure pain perception following cardiac catheterization.
The Cronbach's alpha obtained from a pilot study of the tool was 0.35. Which evaluation does the alpha value indicate?
There is a moderate amount of inter-rater reliability for this tool.
The instrument needs revision due to a lack of internal consistency.
The tool will consistently measure pain perception in clients.
Numerous inverse relationships exist among items on the scale.
The Correct Answer is B
Choice A rationale:
Cronbach's alpha is a measure of internal consistency, not inter-rater reliability. Inter-rater reliability assesses the degree of agreement between different raters or observers, which is not applicable in this context.
Choice B rationale:
This is the correct answer. A Cronbach's alpha value of 0.35 indicates poor internal consistency for the instrument. In other words, the items in the tool do not consistently measure the same underlying construct (pain perception). A low alpha value suggests that the items in the instrument may not be reliably measuring the intended concept and that revision may be necessary to improve the tool's consistency.
Choice C rationale:
The statement "The tool will consistently measure pain perception in clients" is not supported by the low Cronbach's alpha value of 0.35. A low alpha suggests that the tool does not demonstrate consistent measurement of pain perception.
Choice D rationale:
Cronbach's alpha does not provide information about the presence of inverse relationships among items on the scale. It assesses internal consistency, which is about the degree to which items on the scale are interrelated and measure the same construct. A low alpha indicates poor internal consistency but does not specifically indicate the presence of inverse relationships.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Recording vital signs every shift per current hospital-wide policy is a nursing practice guideline but does not necessarily represent the adoption of an evidence-based practice. It may or may not be based on empirical evidence.
Choice B rationale:
Halving the first dose of a narcotic postanesthesia to maintain respiratory effort is a clinical practice that may or may not be evidence-based. It could be a local hospital policy or a customary practice, but it does not specifically describe the adoption of an evidence-based practice.
Choice C rationale:
Bathing dependent clients every other day instead of daily by the staff represents a change in a nursing practice, but it does not necessarily indicate the adoption of an evidence-based practice. Such practices may be based on a variety of factors, including resource allocation and clinical judgment.
Choice D rationale:
Discarding certain antimicrobials after being linked to increased nosocomial infection rates reflects the adoption of an evidence-based practice. This action is based on empirical evidence linking specific antimicrobials to increased infection rates, and the decision to discontinue their use aligns with evidence-based practice principles of incorporating research findings into clinical decision-making.
Correct Answer is A
Explanation
Choice A rationale:
This is the correct answer. A cross-sectional study design involves collecting data from a sample of participants at a single point in time. In this case, the systolic and diastolic blood pressure of each child in one school was measured one time at the end of a school year, making it a cross-sectional study.
Choice B rationale:
A quasi-experimental design typically involves an intervention or treatment, which is not described in this scenario. Quasi-experimental studies also often involve multiple measurements over time.
Choice C rationale:
Comparative studies typically involve comparing two or more groups or conditions but may include multiple measurements over time. The scenario describes a single measurement at the end of the school year.
Choice D rationale:
A prospective study typically involves following participants over time, collecting data at multiple points in the future. This scenario involves a single measurement at one point in time.
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