Question

When human subjects are used during drug tests, researchers usually perform double-blind experiments. In double-blind experiments, neither the researchers nor the human subjects know which subjects are receiving the actual drug (experimental group) and which are instead receiving an inactive placebo (control group). Double-blind experiments are conducted in order to A. decrease the accuracy of the data. B. reduce measurement errors. C. reduce sources of bias. D. improve the precision of the data.

Answer 1

Answer:

The correct option is option C which is to reduce source of bias.

Explanation:

• It is a human nature, if we know about something already and the we have to take decision from results, then we are biased on the bases of early information.
• This is known as power of suggestion, means we suggest instead giving accurate results.
• To reduce this biasness and power of suggestion double blind test are performed.

Answer 2

D) Improve the precision of the data.

Hope it helps! :)