In a two-group study, a highly unusual thing happens: None of the no-treatment group subjects drop out, but 90% of the treatment group subjects drop out. The most obvious problem with this study is
A) mortality
B) selection by maturation interaction
C) history
D) maturation

Question

Quizplus · Accepted Answer

The high dropout rate in the treatment group indicates a mortality problem, as it affects the validity of the study's results by potentially introducing bias.

In a Two-Group Study, a Highly Unusual Thing Happens: None