5366 Research Exam Questions with Correct Answers
2026
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❖ 5366 Research
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, Clinical trial - CORRECT ANSWER -A research study in which a drug, intervention or device is
studied to evaluate the efficacy and safety of treating a specific problem or disease; to find
superior or alternative modalities of treating a specific disease
Randomized control trial - CORRECT ANSWER -gold standard and most commonly used method;
involves identification of population of interest, selecting a sample population from that group
and typically sample population broken into two or more groups
Validity - CORRECT ANSWER -Degree with which correct inferences can be made from the
results of a research study
Internal validity - CORRECT ANSWER -Extent to which results obtained in a research trial are a
function of the variables that were systematically manipulated, measured, and/or observed in
the study
Bias - CORRECT ANSWER -Systematic error; occurs when the way a study was designed,
conducted or recorded leads to systematic deviations from results of the truth
Random error - CORRECT ANSWER -an error that occurs when the selected sample is an
imperfect representation of the overall population; chance error or statistical error; occurs due
to variability in measured data that arrives purely by chance
Selection bias - CORRECT ANSWER -Randomization is the process of assigning study participants
to either experimental or control groups at random to prevent this
Randomization - CORRECT ANSWER -Allocation sequence generation; allocation concealment;
implementation of allocated sequence
Allocation sequence generation - CORRECT ANSWER -Generating unpredictable sequence of
how subjects are allocated; random numbers or computer generated random number system