Note: If more than $13,000 of debt is canceled in one year, the gift giver has to file a gift tax return (although they almost certainly will not owe a tax). That should not affect you as the recipient. Example: Roxy borrowed $6,000 from her dad while she was unemployed. She wrote up a promissory note for the debt.
Control Group and Experimental Group. True experiments must have a control group, which is a group of research participants that resemble the experimental group but do not receive the experimental treatment. The control group provides a reliable baseline data to which you can compare the experimental results.
Used to ensure that the experimental and control groups are equal on some criterion , a design by which researchers attempt to categorize subjects (by age, race, gender) and ensure that the control group has members similar to those in the experimental. Situation-Relevant Confounding Variables.