You want to test people's cola preferences, so you conduct a taste test using two different brands of cola.However, you are worried about possible clues you may give people taking the test.So, you label the two colas and have your assistant, who does not know which cola is which, administer the test to the subjects.Thus, you have prevented yourself and your assistant from giving out any clues by using
A) random selection.
B) random assignment.
C) a single-blind experiment.
D) a double-blind experiment.

Question

Quizplus · Accepted Answer

A double-blind experiment is when both the researcher and the participants are unaware of which treatment group they are in. In this case, the researcher (you) and the assistant are unaware of which brand of cola is being tested. This prevents any unintentional clues from being given to the participants, as well as any bias in the results. Therefore, this is the best choice for the scenario described.

You Want to Test People's Cola Preferences, So You Conduct