Two Researchers Do a Non-Equivalent Control Group Study

Multiple Choice

Two researchers do a non-equivalent control group study. Researcher A matches the groups on key variables, Researcher B does not. All of the following are true EXCEPT

A) Researcher A has reduced the threat of selection
B) Researcher A is vulnerable to selection by maturation interactions
C) Researcher A is more vulnerable to testing effects
D) Researcher A is more vulnerable to regression effects