When some subjects stop participating in an experiment before it is completed,affecting the results of the study,a(n)____ effect has occurred.
A)mortality
B)history
C)instrumentation
D)confounding

Question

Quizplus · Accepted Answer

Mortality effect occurs when some subjects drop out of the experiment before it is completed, thus affecting the results of the study. This is also known as attrition or dropout.

When Some Subjects Stop Participating in an Experiment Before It