_____ is the world's most widely used stimulant.
a.) Nicotine
b.) Dextroampthetamine
c.) Caffeine
d.) Cocaine
Ans: c.) Caffeine
Psychology
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Which schedule of reinforcement reinforces the first correct response after a constant interval of time has elapsed?
a. fixed ratio b. variable ratio c. fixed interval d. variable interval
Psychology
What are internal and external validity? Describe at least four threats to validity
What will be an ideal response?
Psychology