RDN Research and Evidence-Based Practice 3

Question 1

An Institutional Review Board (IRB) in research is PRIMARILY responsible for:

Accepted Answer

Protecting the rights, safety, and welfare of human research participants

Answer

IRBs review research protocols involving human subjects to ensure ethical standards are met, focusing on protecting participant rights, safety, and welfare before and during a study.

Question 2

Valid informed consent for a nutrition research study requires that participants:

Accepted Answer

Voluntarily agree to participate after receiving adequate information about the study's purpose, risks, benefits, and right to withdraw

Answer

Informed consent protects participant autonomy by ensuring they voluntarily agree to participate only after fully understanding the study's purpose, procedures, potential risks and benefits, and their right to withdraw at any time.

Question 3

In a single-blind clinical nutrition trial, which party is unaware of the group assignment?

Accepted Answer

Only the participants do not know their group assignment

Answer

In a single-blind trial, participants do not know whether they are receiving the active intervention or control, which reduces placebo effects and response bias.

Question 4

A cross-sectional study design in nutrition research is BEST used to:

Accepted Answer

Measure exposure and outcome simultaneously at a single point in time

Answer

Cross-sectional studies collect data on both exposure and outcome at one time point, providing a snapshot of prevalence but unable to establish temporal sequence or causality.

Question 5

A prospective cohort study design in nutritional epidemiology is characterized by:

Accepted Answer

Following disease-free individuals forward in time and observing who develops disease based on dietary patterns

Answer

Prospective cohort studies enroll disease-free individuals, collect baseline dietary data, and follow them forward over time to observe incident disease, allowing assessment of temporal exposure-outcome relationships.

(RDN) Registered Dietitian Nutritionist Practice Test

(RDN) Registered Dietitian Nutritionist Practice Test

RDN Research and Evidence-Based Practice 3