#1
Which of the following is NOT a type of research design commonly used in nutrition science?
Experimental research design
Observational research design
Cross-sectional research design
Descriptive research design
#2
What is the purpose of blinding in a research study?
To ensure participants are aware of the study objectives
To prevent bias in the assessment or outcome measurement
To make the study findings more predictable
To increase the cost-effectiveness of the study
#3
Which of the following is a qualitative research method commonly used in nutrition science?
Meta-analysis
Systematic review
Focus group discussion
Randomized controlled trial
#4
Which of the following is a primary source of nutrition data commonly used in research?
Textbooks
Websites
Food composition databases
Magazines
#5
What is the primary purpose of a randomized controlled trial (RCT) in nutrition research?
To establish causality between dietary factors and health outcomes
To describe dietary habits of a population
To identify correlations between nutrition and lifestyle factors
To study long-term effects of dietary interventions
#6
Which statistical test is commonly used to determine if there is a significant difference in mean values between two or more groups in nutrition research?
Chi-square test
T-test
Analysis of Variance (ANOVA)
Correlation analysis
#7
In a double-blind study, who is unaware of which participants belong to the control and experimental groups?
Only the participants
Only the researchers
Both the participants and the researchers
Neither the participants nor the researchers
#8
Which of the following sampling methods involves dividing the population into subgroups and then randomly selecting samples from each subgroup?
Simple random sampling
Stratified random sampling
Convenience sampling
Quota sampling
#9
What is the primary goal of meta-analysis in nutrition research?
To identify potential correlations between variables
To explore cause-effect relationships between dietary factors and health outcomes
To synthesize and analyze data from multiple studies to draw conclusions
To recruit participants for clinical trials
#10
Which of the following research designs is best suited for studying the long-term effects of dietary habits on health outcomes?
Cross-sectional study
Case-control study
Cohort study
Randomized controlled trial
#11
What is the purpose of a pilot study in nutrition research?
To recruit a large number of participants
To test the feasibility and validity of the research protocol
To analyze the final study results
To publish preliminary findings
#12
Which of the following is a limitation of self-reported dietary assessment methods in nutrition research?
They are expensive to administer
They are highly accurate and reliable
They rely on memory and may be subject to recall bias
They provide real-time data
#13
What is a confounding variable in nutrition research?
A variable that influences both the independent and dependent variables
A variable that remains constant throughout the study
A variable that is irrelevant to the study objectives
A variable that only affects the dependent variable
#14
Which of the following statistical analyses is appropriate for examining the association between two continuous variables in nutrition research?
T-test
Chi-square test
Pearson correlation coefficient
Analysis of variance (ANOVA)
#15
What is the primary purpose of conducting a sensitivity analysis in nutrition research?
To determine the statistical power of the study
To test the robustness of the study findings to changes in assumptions or parameters
To assess the validity of self-reported dietary data
To identify confounding variables
#16
Which of the following types of validity assesses whether the findings of a study can be generalized to other populations or settings?
Internal validity
External validity
Construct validity
Face validity