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.

world bank is the correct answer.

glass wants to live in a world of super heroes and villains. he have lived all his life trying to be responsible for the creating the origin story of a super hero; he schemed and caused many incidents (many of them fatal) hoping that someday someone with superpowers would show up and save the day.

he knew himself very much. he saw himself as a villain of a real-life super hero story. he was aware of his strengths (more than smart enough for being manipulative and scheming) and weaknesses (having fragile bones and having to rely on his mind to succeed).