Which data-collection method is most vulnerable to researcher bias? A.questonnaires.
Available data.
Physiological measurement.
Observation methods.
The Correct Answer is D
Choice A rationale
Questionnaires are generally less vulnerable to researcher bias because they are standardized and often self-administered by the participant. The researcher has limited interaction with the subject during data collection, which reduces the chance of leading the participant or misinterpreting their immediate responses. Because the questions are written and the answers are recorded by the respondent, the data remains relatively objective and consistent across different subjects, providing a layer of protection against researcher influence.
Choice B rationale
Available data, such as medical records or historical documents, were created for purposes other than the current research. Because the data already exists and was recorded by others, the researcher cannot easily manipulate the original collection process. While bias can occur during the analysis or selection of which records to include, the data-collection phase itself is relatively immune to new researcher bias since the information was documented before the current study even began.
Choice C rationale
Physiological measurements use objective instruments like thermometers, blood pressure cuffs, or lab assays to collect data. These tools provide numerical values that are not easily influenced by the researcher's opinions or expectations. For example, a normal blood glucose range is 70 to 99 mg/dL; a machine provides this result regardless of the researcher's bias. Because the data comes from mechanical or biological sources, it is considered one of the most objective forms of collection.
Choice D rationale
Observation methods are highly susceptible to bias because the researcher is the primary instrument of data collection. The researcher's own perceptions, values, and expectations can influence what they choose to notice or how they interpret a subject's behavior. There is a risk of selective perception, where the observer only records events that support their hypothesis. Without strict protocols and inter-rater reliability, the subjective nature of human observation makes it the most vulnerable to personal prejudice.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Qualitative sampling does not rely on convenience or availability at a specific site alone because this fails to ensure the depth and breadth of the human experience being investigated. Relying on available subjects at one location introduces significant bias and might exclude critical perspectives necessary for understanding the phenomenon. The goal is to capture diverse lived experiences rather than just meeting a numerical quota based on geographic proximity or ease of access for the researcher.
Choice B rationale
Power analysis is a statistical technique exclusively used in quantitative research to determine the minimum sample size required to detect an effect or relationship with statistical significance. It relies on effect size, alpha levels, and population variance. Because qualitative research does not test hypotheses or use inferential statistics, power analysis is entirely inappropriate. Qualitative studies prioritize the quality and richness of information gathered from participants rather than achieving statistical power or generalizability to larger populations.
Choice C rationale
Determining sample size based on a fixed time frame is a practical constraint but not a scientific or methodological justification in qualitative inquiry. Research quality suffers when data collection is prematurely halted due to scheduling rather than reaching a point of informational redundancy. Scientific rigor in qualitative work requires that the researcher remain in the field long enough to fully explore the complexities of the topic, regardless of how long that process takes within reasonable academic limits.
Choice D rationale
Data saturation is the gold standard for determining sample size in qualitative research. It occurs when no new themes, insights, or information emerge from additional participants. This ensures that the researcher has thoroughly explored the phenomenon and that the data set is comprehensive. Saturation validates that the conceptual categories are fully developed and that further sampling would provide diminishing returns. This approach focuses on the depth of data rather than a predetermined numerical count of subjects.
Correct Answer is A
Explanation
Choice A rationale
The literature review serves as the foundation for the study, providing a theoretical and empirical context that aligns the methodology with the research questions. By understanding what has been done previously, the researcher can select a design that is most capable of answering the specific purpose of the study. This ensures consistency between the stated goals and the methods used, preventing the researcher from drifting away from the core inquiry.
Choice B rationale
A literature review is intended to focus and refine the scope of a study rather than simply enlarging it. Broadening the hypotheses without clinical or theoretical justification can lead to a study that is too vague or lacks sufficient power. Effective reviews help in narrowing down variables to those that are most relevant, ensuring that the research remains manageable and that the hypotheses are grounded in existing scientific evidence and logic.
Choice C rationale
While an objective assessment of knowledge is a function of the literature review, its specific role in design selection is more about identifying the best path forward. Objectivity allows the researcher to see gaps in current science, which then dictates whether an exploratory, descriptive, or experimental design is needed. It provides the rationale for the chosen architecture of the study by highlighting what tools and approaches worked or failed in prior investigations.
Choice D rationale
Comparing current findings with previous ones happens in the discussion section after data has been collected and analyzed. This occurs at the end of the research process, whereas selecting a study design happens at the beginning. The literature review during the planning phase looks at previous findings to inform the design, but the actual comparison of the new results to old ones is a posterior step in the scientific method.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.