1. Chapter 1 Experimentation

2. Experimental group- group in an experiment that is exposed to the treatment Control group- group in an experiment that is not exposed to the treatment Groups

3. Placebo- inactive substance In order to test the effectiveness of a treatment, a placebo is used on the control group Usually it will be a sugar pill Placebo

4. results controlled by expectations alone In other words, sometimes a placebo is effective because the participants BELIEVE that they are really receiving the treatment Placebo effect-

5. Experiment: If employees are allowed to take a nap during lunch, will they be more productive in the afternoon? Independent variables- the factor that is being manipulated, the variable whose effect is being studied Ex: nap Dependent variables- the factor that depends on the independent variable Ex: productivity Variables

6. neither the participants or the researchers know who received the real treatment Why would the double-blind procedure be more effective? Double-blind procedure-