In a research study, when the subjects do not know who is in the experimental group and who is in the control group, but the experimenters do know, the study is called a(n) experiment.
a. single-blind
b. independent
c. double-blind
d. dependent

ANSWER:

The study is called Single-blind experiment when the subjects do not know "who is in the experimental group" and "who is in the control group", but the experimenters do know.

EXPLANATION:

Single-blind is an experiment that is conducted by a researcher who has information about who the participants are and to which groups they belong.However, the participants are not aware of the details of the experiment. The single blind experiments can be biased because researcher has all the necessary information. On the other hand, the double blind experiments are the ones in which neither the researcher nor the participants have the necessary information related to the experiment. Therefore, double blind experiments are considered to be non-biased. In single blind experiments, the researcher who has information related to the experiment can manipulate and make changes to the variables to get the desired results from the experiment.