WGU C431 Quiz 1
When the subjects in a study are not representative of the population, this is a limitation referred
to as . – ✔✔sampling bias is when the determination of whether to publish a study is based on factors other than the
quality of the research and the relevance of its findings. – ✔✔publication bias
observational study that is large in size and longitudinal in duration. The groups in the study are
determined by a given exposure, characteristic, or risk factor. – ✔✔Cohort study
prospective study in which patients are moved from one group to another. They are in the control
group for a period of time and then be moved to one or more treatment groups. Subjects remain
in each group long enough to determine the effect of the given treatment. – ✔✔Cross-over study
_ a research procedure in which all prior studies on a given topic are brought together and
analyzed collectively. – ✔✔Systematic review
study in which the allocation of patients to treatment or control groups is random and concealed.
At least one control group must be utilized. Preferably patients, as well as providers, are not
informed (blinded) regarding which intervention patients receive. – ✔✔Randomized control trial
Researchers strive to remain unbiased, honest, and precise when making decisions regarding the
planning, conducting, and reporting of a quantitative and qualitative study. The previous
statement defines – ✔✔Objectivity
Identify the characteristic of research design that relates to the degree to which the outcomes of
the study can be attributed to the interventions. – ✔✔External validity
What variables interfere with the intended purpose of the investigation by introducing error to
the study? – ✔✔Extraneous variable
Intervening variable
What is the procedure called for assigning subjects to intervention groups (placebo group,
control group, experimental group. – ✔✔External validity
Identify the type of evidence that combines the statistically analyses of multiple independently
conducted studies. – ✔✔Meta-analysis
A power analysis is calculated to – ✔✔Ensure the sample size was large enough to detect
differences in the treatment and comparison group after data collection
In a statistical power calculation, it is the expected amount of effect that is considered a minimal
clinically meaningful difference. – ✔✔effect size