Explain the Matched-Pairs Design

Multiple Choice

Explain the Matched-Pairs Design
-A medical journal published the results of an experiment on anorexia. The experiment investigated the effects of a controversial new therapy for anorexia. Researchers measured the anorexia levels of 72 adult women who suffer moderate conditions of the disorder. After the therapy, the researchers again measured the women s anorexia levels. The differences between the the pre- and post-therapy anorexia levels were reported. What type of experimental design is this

A) matched-pairs design
B) completely randomized design
C) randomized block design
D) single-blind design