Question

An experimental set-up where neither the experimenter nor the participants know who are in the experimental or control groups is known as?

• A. Random experimentation
• B. Blind experimentation
• C. Single blind study
• D. Double blind study

Hint:

Double-blind studies are essential in medical research to eliminate experimenter and participant biases, ensuring objective results.

Answer 1

The Correct Option is D

Step 1: Understand the types of experimental set-ups.
In experiments, to avoid bias: 
- In Single blind study, only participants are unaware of group allocations. 
- In Double blind study, both experimenters and participants are unaware. 
Step 2: Analyze each option.
- Random experimentation: Refers to random assignment, not blindness. (Incorrect)
- Blind experimentation: A general term but not specific. (Incorrect)
- Single blind study: Only participants are blind. (Incorrect)
- Double blind study: Both experimenter and participants are blind. (Correct)
Thus, the correct answer is: \[ \boxed{{Double blind study}} \]