Question

Doctors chase and Sanborn are conducting an experiment on effects of caffeine on memory. Participants are randomly assigned to a caffeine or non-caffeine group; there a recall on of items on a word list is later assist. Which pair correctly identifies a variable in this experiment?

Answer 1

The variable is the group that was given caffine, because thats what the doctors manipulated. They possibly altered the natural memory of the participants by giving them caffine. A more specific variable could be how much caffine each participant is given and what time are they given it.