Dr. Riley wanted to know if adolescent computer use has an immediate effect on their sustained attention. Dr. Riley assigned participants into one of two groups (computer use vs. no computer use) by flipping a coin. Dr. Riley used
A) matching.
B) random assignment.
C) a correlational design.
D) a field experiment.

Question

Quizplus · Accepted Answer

Random assignment is the best choice as it ensures that the two groups are equivalent before the manipulation (computer use) takes place, reducing the potential for confounding variables.

Dr Riley Wanted to Know If Adolescent Computer Use Has