Examlex
Which of the following statements are true of the stroke volume?
I.It is about 110 to 120 mL.
II.Contraction ejects about 70 mL.
III.The end-systolic volume is about 50 mL.
IV.A low ejection fraction is considered one that is less than 50%.
Construct Validity
The degree to which a test or instrument measures the theoretical construct it is intended to measure.
Face Validity
The extent to which a test or instrument appears to measure what it is supposed to measure, based on a superficial assessment.
Third-variable Problem
A confounding issue in research that occurs when a seemingly causal relationship between two variables is actually caused by an unseen, third variable.
Talkativeness
The quality or state of being inclined to talk a lot or engage in conversation frequently.
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