You are studying the effects of watching TV on stress. You hypothesize that watching 30 minutes of TV can help reduce stress. You recruit 40 participants--20 of which you randomly assign to a TV group that watches 30 minutes of TV and 20 of which you assign to a control group that does not watch TV. For the TV group, the participants watch 30 minutes of TV and then measure thecortisol in their saliva as an index of their stress levels.For the control (no TV group) you have participants sit quietly in a room for 30 minutes and then measurethecortisolin their saliva as an index of their stress levels. You also ask participants to report how much time they spend watching TV on a regular basis.

1. First, identify whether this is an independent- or within-groups design.
2. Second, how would you change this experiment switch the experimental design type. That is, if it is an independent-groups design, how would you change the experiment to make it a within-groups design. Or, if it is a within-groups design, how would you change the experiment to make it an independent-groups design?

Your response should be 2-3 sentences.