You want to find out if lighting conditions affect...

You want to find out if lighting conditions affect performance in a certain video game. You have one group of subjects play the game with a bright screen and another group with a dimmer screen. Which of the following is definitely a control variable in this experiment (more than one choice COULD be a control variable, but one DEFINITELY is).

Dr. Branch would like to study the relationship between room lighting and college students' test performance. He randomly assigns college students to two groups. The first group takes an exam in a dimly lit room and the second group takes the same exam in a regularly lit room. What is the dependent variable? In an experimental study, men with bipolar disorder received either high dose of Lithium or a placebo. In this study, the drug dosage (none versus peak dose) was the Dr. Branch would like to study the relationship between room lighting and college students' test performance. He randomly assigns college students to two groups. The first group takes an exam in a dimly lit room and the second group takes the same exam in a regularly lit room. What is the independent variable?

Asma V.

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