Only need #3 & #4

2. A researcher is interested in studying the effect of multi-tasking on how long it takes to complete a task. Students are randomly assigned to one of three groups: recite the alphabet, count to 26, or go both by going back and forth (A-1-B-2, etc.). a. Identify the DV and IV b. What is the study design? C. Write the null and alternate hypotheses. d. What statistical test would you use to test your hypothesis? e. Why? 3. This research focused on the brain functioning of people in love. Participants who rated themselves as being intensely in love, viewed a photo of their beloved, did a distracter task, and then viewed a photo of a neutral acquaintance while researchers took functional magnetic resonance imagery (fMRI). Each participant repeated the procedure six times. When participants looked at pictures of their beloved, the fMRI indicated systematic activation of particular parts of the brain. Intense romantic love is connected with reward regions of the brain, as well as the motivation system needed to acquire rewards. a. Identify the DV and IV b. What is the study design? c. Write the null and alternate hypotheses. d. What statistical test would you use to test your hypothesis? e. Why? 4. This multigroup experiment examined the use of an obscenity on the persuasiveness of a pro-attitudinal message and on perceptions of the communicator. Participants watched one of three versions of a video in which the speaker advocated lowering tuition at another university. In the first version, the speaker used the word "damn" at the beginning of the message. In the second version, "damn" appeared at the end of the message. In the control condition, the speaker did not use the word "damn." The use of the obscenity, regardless of position, made the message more effective. Swearing, however, did not impact the speaker's perceived credibility. a. Identify the DV and IV E} 2. A researcher is interested in studying the effect of multi-tasking on how long it takes to complete a task. Students are randomly assigned to one of three groups: recite the alphabet, count to 26, or go both by going back and forth (A-1-B-2, etc.). a. Identify the DV and IV b. What is the study design? C. Write the null and alternate hypotheses. d. What statistical test would you use to test your hypothesis? e. Why? 3. This research focused on the brain functioning of people in love. Participants who rated themselves as being intensely in love, viewed a photo of their beloved, did a distracter task, and then viewed a photo of a neutral acquaintance while researchers took functional magnetic resonance imagery (fMRI). Each participant repeated the procedure six times. When participants looked at pictures of their beloved, the fMRI indicated systematic activation of particular parts of the brain. Intense romantic love is connected with reward regions of the brain, as well as the motivation system needed to acquire rewards. a. Identify the DV and IV b. What is the study design? c. Write the null and alternate hypotheses. d. What statistical test would you use to test your hypothesis? e. Why? 4. This multigroup experiment examined the use of an obscenity on the persuasiveness of a pro-attitudinal message and on perceptions of the communicator. Participants watched one of three versions of a video in which the speaker advocated lowering tuition at another university. In the first version, the speaker used the word "damn" at the beginning of the message. In the second version, "damn" appeared at the end of the message. In the control condition, the speaker did not use the word "damn." The use of the obscenity, regardless of position, made the message more effective. Swearing, however, did not impact the speaker's perceived credibility. a. Identify the DV and IV E}