Note: It is optional to retake the following questions. If you choose to retake these questions, I will take the highest score for each question based on your original and resubmitted response. You have until noon 3/9 to submit the questions if you choose to do so. Ensure in your response that you speak to internal and external validity considerations specific to the described research question/design. You can enter your response for each question in the text box or upload a word document with your responses. Question Prompt: A researcher is interested in whether the level of brightness in a room affects college students' exam scores. The researcher identifies two sections of an existing course, with one section meeting at 2pm and the other section meeting at 6pm on the same day. Each student is only in one section. The researcher assigns the 2pm class to take a written exam with the lights at 100% brightness. The 6pm class takes the same exam with the lights at 75% brightness. The researcher then runs a t-test to compare mean exam scores for the two sections. 1. What are potential risks to internal validity that the researcher should keep in mind? (Scored out of 8pts) 2. What steps can the researcher take to help address concerns regarding internal validity? (Scored out of 7pts) 3. What are potential risks to external validity that the researcher should keep in mind? (Scored out of 8pts) 4. What steps can the researcher take to help address concerns regarding external validity? (Scored out of 7pts)

Fig: 1