A ten-year-old tested professional touch therapists. Using a wood partition, he held a hand above one of the therapist's hands, and the therapist was asked to identify the hand that was chosen. The same test was then given to non-therapist. 

 

Choose the correct answer below.

 

A.

The study is an observational study because all participants were observed only once and under the same conditions.

 

 

B.

The study is an observational study because it is a retrospective study using data from the past.

 

 

C.

The study is a meta-analysis because the study was done on a group.

 

 

D.

The study is an experiment because a hypothesis is tested.

 

E.

The study is a meta-analysis because an analysis of the data was used to determine effectiveness.

 

F.

The study is an experiment because there is a treatment group and a control group.