When some subjects exit the experiment before it is completed and this effects the results of the study, this is an example of a _____.
A) mortality effect
B) history effect
C) instrumentation effect
D) confounding effect

Question

Quizplus · Accepted Answer

The mortality effect, also known as attrition, occurs when participants drop out of a study before it is completed. This can bias the results of the study as certain types of participants may be more likely to drop out, causing the remaining sample to be non-representative of the initial sample.

When Some Subjects Exit the Experiment Before It Is Completed