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

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) naturalistic observation.
B) random sampling.
C) the double-blind procedure.
D) replication.











Answer: C


AP Psychology

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