Which method is the BEST way to divide participants into groups for an experiment?
A) dividing participants by hair color
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 is the best way to divide participants into equal and unbiased groups as it does not rely on any arbitrary or potentially biased criteria such as hair color or alphabetical order, and does not give participants the opportunity to self-select into certain groups.

Which Method Is the BEST Way to Divide Participants into Groups