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Doctors chase and sanborn are conducting an experiment on the effects of caffeine on memory. participants are randomly assigned to a caffeine or a no-caffeine group; their recall of items on a word list is later assessed. which pair below correctly names and identifies the variables in this experiment?

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the answer to this question is Word recall--dependent variable; caffeine--independent variable
In an experiment, variables refer to everything that would change if other pre-existing condition is changed. This make it really important in every research in order to determine the cause and effect of a certain phenomenon/occurence