A procedure used to hide the group assignment from the participants in a study to prevent their beliefs about the effectiveness of a treatment from affecting the results is ______.
A) double-blind design
B) tri-blind design
C) multi-blind design
D) single-blind design

Question

Quizplus · Accepted Answer

A single-blind design is used to hide the group assignment from the participants in a study while keeping the experimenter(s) aware of the group assignment. This helps prevent the participants' beliefs about the effectiveness of a treatment from affecting the results. A double-blind design involves keeping both the participants and the experimenter(s) unaware of the group assignment. Tri-blind and multi-blind designs are not commonly used terms in research methodology.

A Procedure Used to Hide the Group Assignment from the Participants