(Scenario III) Suppose the researchers who conducted the study described in Scenario III surveyed participants about their caffeine use. Based on their answers, each participant was then assigned to the caffeine condition or control condition. This method of assignment is best described as:
A) random.
B) nonrandom.
C) matched.
D) pseudo-random.

Question

Quizplus · Accepted Answer

The method of assignment described is nonrandom because participants were assigned to conditions based on their responses to a survey about their caffeine use, rather than being randomly assigned.

(Scenario III) Suppose the Researchers Who Conducted the Study Described