To pursue a PhD in User Interface (UI) and User Experience (UX) Design, you will need to complete a Master's degree in Design or a related field and then apply to PhD programs at universities or research institutions. The process for applying to a PhD program will vary depending on the institution you are applying to, but generally, you will need to submit an application, transcripts, letters of recommendation, a research proposal, and possibly a writing sample.
Some universities may also require you to take a qualifying exam or interview as part of the application process. It is advisable to check with the university or institution you are interested in applying to for specific requirements and guidelines for their PhD program in Design.
In addition to the academic requirements, you will also need to have strong research skills and a clear research interest or focus to be competitive for a PhD program in UI and UX Design. It is advisable to start thinking about your research interests early on in your studies and to seek out research opportunities and experiences that will help you develop your skills and knowledge in this area.
UI and UX Design are interdisciplinary fields that involve the use of design principles and techniques to create user-centered products and services. A PhD in UI and UX Design may involve research in areas such as human-computer interaction, usability, user research, information architecture, and design thinking.
Remember, a PhD is a demanding and rigorous program that requires a significant investment of time and effort. Make sure you are prepared for the challenges and rewards of a PhD program before you apply.