Researchers can now see actual thought processes by measuring the increases of blood flow and oxygen to different sections of the brain.
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Marijuana is classified as a psychoactive.
Answer:
Random assignment.
Explanation:
Random assignment (also known as random allocation, or randomization), in psychology experiments, is randomly selecting participants or units by the use of chance procedures so that each participant or unit has the same chance (equal likelihood) of being assigned to any particular control or treatment group.
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