Which method is the BEST way to divide participants into groups for an experiment?
A)dividing participants by hair colour
B)allowing participants to choose which group to join
C)dividing participants by where their names fall on an alphabetic list
D)flipping a coin for each participant

Question

Quizplus · Accepted Answer

Flipping a coin for each participant ensures random assignment, which helps eliminate bias and ensures that each group is similar in all respects except for the treatment being tested.

Which Method Is the BEST Way to Divide Participants into Groups