I believe the answer is: double blind procedures
double blind procedures refers to a form of study in which both participants and the researchers do not know which subjects are receiving the treatment. The purpose of double blind procedures is to prevent the bias held by the experimenters along with placebo effects.
Answer:
The Zhou Dynasty is often divided up into the Western Zhou and Eastern Zhou periods. ... Around 770 BC the Zhou king lost control of some of his territories. Many of his lords rebelled and took over the capital city. The son of the Zhou king escaped to the east, however, and built a new capital.
The Zhou Dynasty is divided into two periods: the Western Zhou (11th century BC to 771 BC) and the Eastern Zhou (770 BC - 221 BC). ... The achievements during the Zhou Dynasty in economy, politics, science and culture, were much more illustrious than any which occurred during the Shang Dynasty.
Answer:
There were three types of British colonies: royal, proprietary, and self-governing. Each type had its own characteristics. Proprietary colonies, such as Pennsylvania, Maryland, and Delaware, were basically land grants from the British government.
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