Volunteers for a human performance study were randomly divided into two groups. The first group had their flexibility measured in the morning after a short meditation session while the second group had their flexibility measured in the afternoon with no previous meditation session. The flexibility scores of the two groups were compared.
The study design for this experiment is called a(n):
A) simple random sample design.
B) completely randomized design.
C) matched pairs design.
D) randomized block design.
E) observational study.

Question

Quizplus · Accepted Answer

This is a completely randomized design because participants were randomly assigned to one of two groups, and the treatment (meditation session or no meditation session) was applied randomly across these groups.

Volunteers for a Human Performance Study Were Randomly Divided into Two