Question

from 2003 to 2007, a group of doctors studied the effects of a new attention deficit disorder medication on adults. to compare results, the doctors gave half their patients the new medication and maintained the other half of their patients on their current medication. what is being used in this example? the effect of a treatment unit the placebo effect a control group sampling error voluntary response bias

Explanation:

In an experiment, a control group is used for comparison. Here, half of the patients are given the new medication (treatment group) and the other half are kept on their current medication (control group) to study the effects of the new attention - deficit disorder medication. The placebo effect involves a non - active substance, which isn't the case here. Sampling error is about inaccuracies in sampling, and voluntary response bias is about self - selected responses, neither of which apply. The effect of a treatment unit isn't the correct term for this comparison setup.

Answer:

C. A control group