Multiple choice

In an experiment to find out if taking ginseng increases IQ scores, the IQ scores would be

  1. the independent variable

  2. a control variable

  3. an extraneous variable

  4. the dependent variable

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In an experiment, the dependent variable is the factor being measured or tested for change. Since the study measures IQ scores to see if ginseng has an effect, the scores are the dependent variable.