A study is examining the effect of a new antilipemic drug, compared with placebo, on lipoprotein levels in postmenopausal women
Which of these actions represents the researcher's attempt at constancy in data collection to control extraneous variables?
a. Drawing the serum lipoprotein levels of all subjects at the same time of day
b. Having the same phlebotomist draw serum lipoprotein levels of all subjects
c. Using the same room for drawing blood for lipoprotein levels of all subjects
d. Ensuring that all subjects are postmenopausal women taking lipid-lowering medication
ANS: A
Feedback
A Constancy in data collection (e.g., identical timing of collecting blood samples) helps maintain control in the research design because lipid levels may fluctuate throughout the day.
B In this scenario, it is not necessary for the same person drawing blood samples to maintain constancy of measurement.
C The same room for blood draws is not necessary to maintain constancy of measurement.
D If subjects were already receiving antilipemic medication, it would be extremely difficult to distinguish the effects of the new treatment.
You might also like to view...
Often, when patients are unhappy or behaving negatively, it is the result of which of the following? (Select all that apply.)
a. Angst b. Sorrow c. Anxiety d. Pain
An elderly client is admitted to the healthcare facility with acute respiratory distress. The
client's health record has a DNR or "do not resuscitate" order. Which must the nurse perform if the client suddenly develops cardiopulmonary arrest? A) A full code is initiated at the earliest B) The client is allowed to die naturally C) Cardiopulmonary resuscitation without drugs is initiated D) The code team is called with intervention delayed until the physician arrives
During his last shift, a nurse realized that he made a medication error by administering a medication to the wrong client. Which nurse's subsequent action best demonstrates accountability?
A) Administering the correct medication to the correct client during his next shift B) Assessing the client vigilantly after discovering the drug error C) Writing up an incident report and taking action to review correct medication administration D) Reviewing his notes on adverse reactions to medications and explaining these to a colleague
Statins are classified as antitussives.
a. true b. false