In which оf the fоllоwing situаtions would written informed consent not necessаrily be required?
RESEARCH STUDY 8.1 Dr. Fаrаh is аn educatiоnal psychоlоgist who is interested in studying the link between homework and academic achievement. Over the years, several researchers have found a link between the two, suggesting that doing homework is associated with higher grades. However, Dr. Farah is curious about the possible causal link between the two variables. She conducts the following study. At the beginning of the spring semester, Dr. Farah measures the number of hours her students spend doing homework during the preceding week (called "Fall Number of Hours of Homework" in the table below) and their fall GPA (a measure of academic achievement). At the end of the semester, Dr. Farah measures the same variables again: the hours spent doing homework the preceding week (called "Spring Number of Hours of Homework" in the table below) and their spring GPA. She finds the following correlations. Variable A Variable B Correlation Coefficient Correlation A Fall Number of Hours of Homework Fall Semester GPA .83* Correlation B Spring Number of Hours of Homework Spring Semester GPA .80* Correlation C Fall Number of Hours of Homework Spring Semester GPA .69* Correlation D Fall Number of Hours of Homework Spring Number of Hours of Homework .36* Correlation E Fall Semester GPA Spring Number of Hours of Homework .18 Correlation F Fall Semester GPA Spring Semester GPA .45* * Indicates a statistically significant relationship. Refer to Research Study 8.1 above to answer the following question. What type of study design is Dr. Farah using?