Explanatory variable Choose… A dummy treatment that looks like the real one The outcome that is measured Neither the participants nor the people measuring outcomes know who received which treatment Subjects who do not receive the new treatment, for comparison The variable whose effect is being studied Using chance to decide which subjects get which treatment
Response variable Choose… A dummy treatment that looks like the real one The outcome that is measured Neither the participants nor the people measuring outcomes know who received which treatment Subjects who do not receive the new treatment, for comparison The variable whose effect is being studied Using chance to decide which subjects get which treatment
Control group Choose… A dummy treatment that looks like the real one The outcome that is measured Neither the participants nor the people measuring outcomes know who received which treatment Subjects who do not receive the new treatment, for comparison The variable whose effect is being studied Using chance to decide which subjects get which treatment
Placebo Choose… A dummy treatment that looks like the real one The outcome that is measured Neither the participants nor the people measuring outcomes know who received which treatment Subjects who do not receive the new treatment, for comparison The variable whose effect is being studied Using chance to decide which subjects get which treatment
Double-blind Choose… A dummy treatment that looks like the real one The outcome that is measured Neither the participants nor the people measuring outcomes know who received which treatment Subjects who do not receive the new treatment, for comparison The variable whose effect is being studied Using chance to decide which subjects get which treatment
Random assignment Choose… A dummy treatment that looks like the real one The outcome that is measured Neither the participants nor the people measuring outcomes know who received which treatment Subjects who do not receive the new treatment, for comparison The variable whose effect is being studied Using chance to decide which subjects get which treatment