Question

A nutrition scientist designs a study in which he assigns 100 people to the treatment group and 100 people to the control group. Although the scientist knows each person's group assignment, the subjects are not aware of their group placement. This is an example of _________.a. double-blind study
b. uncontrolled study
c. single-blind study
d. biased study

Answer 1

Answer: Single blind study

Explanation:

There are various types of terms and conditions on which the clinical trial is based. There the condition is single blind study.

The experimenter is the person performing the experiment on the participants.

In this condition the participants have no idea about the treatment but the experimenter performing the experiment is aware of the treatment or medicine which is given to the participants.

Answer 2

Answer:

Option C, single-blind study

Explanation:

In a single blind study, the researcher is aware of the experimental group in which the subject is placed. However, the subject is unaware of its placement. Such kinds of experiments are conducted to reduce the risk of errors or variation in participant’s response, if they come to know the group type in which they are placed.  

In a double blind study both the researcher and the subject of the experiment are unaware of the groups in which the subject is placed while conducting the experiment

Hence, option C is correct