Blog

What does centrality measure in network graphs?

What is the purpose of hyperparameter tuning in neural networks?

I understand that exams in this class are individual, and that conferring with other students on them is a violations of the University’s ethical standards. I also understand that using the Internet during exams to access external material (not found in Canvas or lecture notes) is prohibited.

Use the following scenario to answer the next five questions: Dr. Gutierrez is teaching a developmental psychology class this semester. In class one day, they got to discussing a research study on the impact of nutrition on cognitive performance in elementary school students. Michael questions the study, saying, “I don’t know. How can you get an overall measure of a child’s nutrition?” Jaden also questions the study, asking, “Which schools did they include? I am curious if they included urban, suburban, and rural school students.” Claudio also is curious about the study, asking, “I wonder how strong the relationship is between nutrition and cognitive performance. Could you predict one from the other?”

The Better Drug research group is developing a new drug that treats anxiety. They have given the drug to all their patients, and all of them have experienced a decrease in anxiety symptoms. Although this is interesting, his experience is limited because he does not have:

Use the following scenario to answer the next three questions: Dr. Toure is considering conducting a study examining whether extroverts have better friendships than introverts. One of her first tasks is to determine which of her participants are extroverts and which are introverts. She decides to use the scale created by a colleague, the Franklin scale. Here are three of the statements that participants need to rate: Question 1: “I get energy from being around other people.” Question 2: “I would rather spend time with one friend vs. go to a gathering with lots of acquaintances.” Question 3: “I feel very comfortable in large group settings.”  

Use the information from the Toure scenario for this question. Dr. Toure calculates a correlation coefficient (r) to examine the relationship between Question 1 and Question 2 and between Question 1 and Question 3. She finds a correlation coefficient of r = −0.81 between Questions 1 and 2 and a correlation coefficient of r = 0.68 between Questions 1 and 3. Which of the following is true of her findings?

Use the following scenario to answer the next five questions: Dr. McManaman is a clinical psychologist researching addiction to pornography. Pornography addiction is defined as being unable to resist impulses to very pornography. Bothered by not having a good measure that he can give to clients to determine whether they are suffering from this condition, he creates a new measure of pornography addiction. The measure has 15 questions, and it takes 20 minutes to complete.

68% of scores on a normal distribution will fall within 1 ____________ of the mean.

Why is it important to be a knowledgeable consumer of research?