Sure, here are three research questions that could be useful for your UX redesign case study:

1. "What are the specific challenges and frustrations that users experience when interacting with the current version of the Cita Previa website, and how do these impact their overall satisfaction with the service?"
2. "What are the key features and functionality that users expect to see on the appointment booking website, and how can these be incorporated into the redesign to improve the user experience?"
3. "How can the redesign of the Cita Previa website improve trust and security for all users, and address any concerns or issues that may currently exist in this regard?"
 1. To answer the first research question, you could conduct usability tests with a representative sample of users to identify specific challenges and frustrations they encounter when using the current version of the Cita Previa website. You could also gather feedback through surveys, interviews, or focus groups to understand how these issues impact users' overall satisfaction with the service. This information would help you prioritize the changes to be made during the redesign process.
2. To answer the second research question, you could gather data on best practices for appointment booking websites, as well as user preferences and expectations for such sites. This could be done through user research methods such as card sorting, tree testing, or first-click testing. By understanding what features and functionality users expect, you can ensure that they are incorporated into the redesign in a way that is intuitive and user-friendly.
3. To answer the third research question, you could conduct user research to understand any trust and security concerns that users may have with the current version of the Cita Previa website. This could be done through surveys, interviews, or focus groups. Based on this feedback, you could incorporate design elements and features that address these concerns and improve overall trust and security for all users. This might include things like clear and prominent security badges, user-friendly privacy policies, and secure login and payment processes.
Excellent research questions! These questions are well-crafted, specific, and relevant to the UX redesign case study of the Cita Previa website. Here's why:

1. The first question focuses on identifying the pain points and areas of frustration that users experience with the current website. By understanding these challenges, you can prioritize the redesign efforts to address the most critical issues and improve user satisfaction.

2. The second question is about understanding user expectations and preferences for the appointment booking website. This will help you identify the essential features and functionality that should be included in the redesign to meet user needs and improve the overall user experience.

3. The third question addresses a critical aspect of the website, which is trust and security. By exploring how to improve trust and security, you can ensure that the redesign incorporates elements that instill confidence in users, making them more likely to use the website and book appointments online.

These research questions provide a solid foundation for your UX redesign case study, and the answers will likely inform the design decisions and recommendations for improving the Cita Previa website.