Dr.Rose conducts a study to determine if caffeine can aid memory.Her three groups of subjects receive a high dose,a low dose,or no caffeine.They all receive identical-looking pills so that they are unaware of how much caffeine they take.In addition,when the researcher tests the memory of each subject,she is not aware of what group each subject is in.This research design utilizes which of the following?
A) random assignment
B) single-blind technique
C) double-blind technique
D) self-selection bias

Question

Quizplus · Accepted Answer

The research design described utilizes the double-blind technique, in which both the subjects and the researcher are unaware of which group each subject is in. This helps to eliminate bias and increase the validity of the study's results. Therefore, choice C is the correct answer. Random assignment is a common method to assign subjects to groups randomly, but it is not explicitly mentioned in this scenario. Single-blind technique means either the subject or the researcher is unaware of the group assignment, but not both. Self-selection bias occurs when subjects choose which group they want to be in, which is not the case in this scenario.

DrRose Conducts a Study to Determine If Caffeine Can Aid