Which research problem is minimized when the researcher matches treatment and control subjects, assigns subjects to treatments randomly, or uses ANCOVA?
A) Having initial differences among treatment groups
B) Statistical regression
C) Contamination from a previous treatment
D) Significant interaction effects

Question

Quizplus · Accepted Answer

Matching treatment and control subjects, random assignment, and using ANCOVA are strategies primarily aimed at minimizing initial differences among treatment groups, ensuring that the groups are as similar as possible on pre-treatment measures.

Which Research Problem Is Minimized When the Researcher Matches Treatment