Research Methodology Concepts, Exams of Nursing

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NUR3 643

Research & Theory

MIDTERM 1 GUIDE (Q & S)

1. Multiple Choice: Which research design is most appropriate for establishing causality? a) Descriptive b) Correlational c) Experimental d) Case Study Answer: c) Experimental Rationale: Experimental designs allow the researcher to manipulate the independent variable and control for confounding variables, thereby providing a clear cause-and-effect relationship.
2. Fill-in-the-Blank: The __________ effect occurs when the presence of the researcher influences the behavior of participants. Answer: Hawthorne Rationale: The Hawthorne effect refers to the alteration of behavior by the subjects of a study due to their awareness of being observed.
3. True/False: In qualitative research, the researcher is considered the primary instrument of data collection. Answer: True Rationale: In qualitative research, the researcher actively engages with participants and collects data through observation, interviews, or focus groups, making them the primary instrument.

Rationale: The null hypothesis posits no relationship or difference, and through research, investigators seek to provide evidence to reject this hypothesis.

7. True/False: Random sampling is a method that ensures each member of the population has an equal chance of being included in the sample. Answer: True Rationale: Random sampling is a foundational concept in probability sampling techniques, which aims to reduce selection bias and increase the generalizability of the results.
8. Multiple Response: Which of the following are essential components of informed consent in research? a) Explanation of the research purpose. b) Disclosure of risks and benefits. c) Assurance of confidentiality. d) Guarantee of compensation. Answers: a) Explanation of the research purpose, b) Disclosure of risks and benefits, c) Assurance of confidentiality. Rationale: Informed consent must include an explanation of the study, risks and benefits, and confidentiality, but not necessarily compensation.
9. Multiple Choice: In a double-blind study, who is unaware of the treatment assignments? a) Participants only b) Researchers only

c) Both participants and researchers d) Neither participants nor researchers Answer: c) Both participants and researchers Rationale: A double-blind study is designed to prevent bias by ensuring that neither the participants nor the researchers know who is receiving the treatment or the placebo.

10. Fill-in-the-Blank: A study's __________ validity refers to the extent to which its results can be generalized to other settings or groups. Answer: External Rationale: External validity pertains to the applicability of the study's findings beyond the immediate study setting or sampled population.
11. True/False: The dependent variable is the variable that is manipulated by the researcher. Answer: False Rationale: The independent variable is manipulated to observe its effect on the dependent variable, which is the outcome of interest.
12. Multiple Response: Select all that apply. Which types of validity are important in research studies? a) Construct validity b) Statistical conclusion validity c) Internal validity d) External validity

Rationale: Peer review provides a critical assessment by experts in the field, which enhances the quality and credibility of the research.

16. Multiple Response: Which of the following are common ethical considerations in research? a) Obtaining informed consent b) Ensuring anonymity c) Providing financial incentives d) Avoiding harm to participants Answers: a) Obtaining informed consent, b) Ensuring anonymity, d) Avoiding harm to participants. Rationale: Ethical research practices require informed consent, protection of participants' identities, and the avoidance of harm.
17. Multiple Choice: Which statistical test is used to compare the means of two independent groups? a) Chi-square test b) T-test c) ANOVA d) Regression analysis Answer: b) T-test Rationale: The t-test is specifically designed to test the difference between the means of two groups.

18. Fill-in-the-Blank: The __________ effect size measure is commonly used in reporting the results of a t-test. Answer: Cohen's d Rationale: Cohen's d is a measure of effect size that indicates the standardized difference between two means.
19. True/False: A p-value less than 0.05 is commonly considered statistically significant in research. Answer: True Rationale: A p-value less than 0.05 typically indicates that the results are statistically significant, meaning there is less than a 5% probability that the observed effects are due to chance.
20. Multiple Response: What are the key elements of a research proposal? a) Literature review b) Methodology c) Budget d) Expected outcomes Answers: a) Literature review, b) Methodology, d) Expected outcomes. Rationale: A research proposal should outline the background literature, the methods to be used, and the anticipated results, but not necessarily the budget.

3. Which statistical test is typically used to compare the means of three or more independent groups?
   • A) t-test
   • B) ANOVA
   • C) Chi-square test
   • D) Pearson correlation Answer: B Rationale: ANOVA (Analysis of Variance) is used to compare means among multiple groups.
4. What does the term "validity" refer to in research?
   • A) Consistency of measurements
   • B) Accuracy of results
   • C) Generalizability of findings
   • D) Reproducibility of results Answer: B Rationale: Validity refers to whether a study is measuring what it intends to measure and the accuracy of the results derived from it.
5. Which of the following is an example of a non-parametric statistical test?
   • A) t-test
   • B) ANOVA

• C) Mann-Whitney U test
• D) Pearson correlation Answer: C Rationale: The Mann-Whitney U test is a non-parametric test used to assess whether there is a significant difference between the distributions of two independent groups.

Fill-in-the-Blank Questions

6. The __________ variable is the outcome variable that researchers measure in an experiment. Answer: dependent Rationale: The dependent variable is what is being measured or tested in an experiment.
7. Qualitative research often utilizes __________ sampling techniques to select participants for in-depth study. Answer: purposive Rationale: Purposive sampling is used in qualitative research to intentionally select participants who meet certain criteria.
8. In the context of clinical research, __________ refers to the process of assessing the safety and efficacy of a new intervention before it is widely offered. Answer: clinical trials

Answer: False Rationale: Qualitative research often uses smaller sample sizes to allow for depth of understanding rather than statistical relevance.

13. True or False: Informed consent is not necessary for participation in observational research. Answer: False Rationale: Informed consent should always be obtained in accordance with ethical research standards, including observational studies.
14. True or False: A confounding variable can distort the perceived relationship between the independent and dependent variables. Answer: True Rationale: Confounders can introduce bias and lead to erroneous conclusions about relationships in research.
15. True or False: The internal validity of a study refers to the extent to which the results can be generalized to other settings or populations. Answer: False Rationale: Internal validity relates to the degree of confidence that the causal relationship identified is valid within the study itself.

Multiple Response Questions

16. Which of the following are characteristics of quantitative research? (Select all that apply.)
    • A) Random sampling
    • B) Use of large sample sizes
    • C) Narrative descriptions
    • D) Statistical analysis Answers: A, B, D Rationale: Quantitative research is characterized by designs that use random sampling, large sample sizes, and statistical analysis, unlike qualitative methods that often feature narrative descriptions.
17. Which of the following are ethical principles in research involving human subjects? (Select all that apply.)
    • A) Beneficence
    • B) Autonomy
    • C) Justice
    • D) Deception Answers: A, B, C Rationale: The ethical principles include beneficence (doing good), autonomy (respecting individuals’ rights), and justice (fair treatment), while deception is generally considered unethical especially in research involving human subjects.
18. What are common data collection methods used in research? (Select all that apply.)

• C) Surveys with Likert scales
• D) Observations Answers: A, B, D Rationale: Interviews, focus groups, and observations are qualitative methods, while surveys with Likert scales often produce quantitative data.

Additional Questions (21-40)

21. In a meta-analysis, studies included are often assessed for which of the following? (Select all that apply.)

• A) Publication bias
• B) Methodological quality
• C) Sample size
• D) Findings Answers: A, B, C, D Rationale: All these elements are assessed to evaluate the credibility of studies before including them in a meta-analysis.

22. Which of the following are types of qualitative research design? (Select all that apply.)

• A) Narrative research
• B) Case study
• C) Longitudinal study

• D) Ethnography Answers: A, B, D Rationale: Narrative research, case studies, and ethnography are distinct qualitative designs, whereas longitudinal studies are typically quantitative.

23. What level of evidence is a randomized controlled trial labeled as according to the Evidence-Based Practice pyramid? (Select one.)

• A) Level I
• B) Level II
• C) Level III
• D) Level IV Answer: A Rationale: Randomized controlled trials are considered Level I evidence due to their high reliability and reduced bias.

24. What are potential biases that can occur in quantitative research? (Select all that apply.)

• A) Selection bias
• B) Confirmation bias
• C) Observer bias
• D) Design bias Answers: A, B, C, D

27. Which factors are considered when developing a research question? (Select all that apply.)
    • A) Clarity
    • B) Relevance
    • C) Feasibility
    • D) Complexity Answers: A, B, C Rationale: Clarity, relevance, and feasibility are essential to forming effective research questions; complexity may not necessarily be beneficial.
28. In which scenarios is a longitudinal study most appropriate? (Select all that apply.)
    • A) Assessing changes over time
    • B) Identifying cause-and-effect relationships
    • C) Studying rare outcomes
    • D) Examining trends within populations Answers: A, B, D Rationale: Longitudinal studies are suited for assessing changes over time and population trends, while rare outcomes may require a different design.
29. What components are essential in a systematic review? (Select all that apply.)
    • A) Explicit methodology

• B) Inclusion/exclusion criteria
• C) Comprehensive search strategy
• D) Authors' opinions Answers: A, B, C Rationale: Systematic reviews require rigorously defined methods, criteria, and search strategies, but should not include authors’ opinions.

30. True or False: Qualitative research findings can be generalized to the larger population. Answer: False Rationale: Qualitative research is typically context-specific and not intended for generalization due to its subjective nature.
31. Which of the following sampling methods can introduce selection bias? (Select all that apply.)

• A) Convenience sampling
• B) Stratified random sampling
• C) Systematic sampling
• D) Snowball sampling Answers: A, D Rationale: Convenience and snowball sampling can introduce selection bias because they depend on non-random criteria.