Both the researchers and the participants in a memory study are ignorant about which participants have actually received a potentially memory-enhancing drug and which have received a placebo. This investigation involves the use of:.
a. random sampling
b. double blind procedure
c. replication
d. hindsight bias

Double blind procedure

Explanation:

Both the researchers and the participants in a memory study are ignorant about which participants have actually received a potentially memory- enhancing drug and which have received a placebo. This investigation involves the use of double blind procedure.

A double blind procedure is an experimental procedure in which neither the subjects of the experiment nor the persons administering the experiment know the critical aspects of the experiment. Both the researchers and the participants in a memory study are ignorant about which participants have actually received a potentially memory- enhancing drug and which have received a placebo so the double blind procedure is important when testing a specific medication or new drugs.

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.