As a graduating PhD student, I feel very fulfilled and satisfied when I look back on my research career. During this time, I have not only gained professional knowledge and skills, but also made many excellent peers and supervisors.First, I would like to thank my supervisors Emma García-Meca and Jennifer Martínez-Ferrero for their selfless guidance and assistance throughout my research.From the beginning of my PhD, they gave me a very long-term plan; throughout my PhD, they clearly informed me of what I needed to achieve at each stage, so I was very fortunate to have avoided a lot of detours. I remember in my first year, my supervisors gave me the most help and guidance on everything from choosing a topic for my thesis, data collection, research methodology design and so on! They gave me valuable advice and suggestions on every revision and review of my thesis. To solve technical difficulties, they helped me in every possible way including but not limited to recording videos, video chat, sending me relevant papers, contacting professionals to help solve problems with SciMAT, etc. On many occasions during the dissertation process, when I was at a loss, Emma García-Meca and Jennifer Martínez-Ferrero were the first to give me patient guidance and encouragement, giving me the confidence and courage not to give up. Every time I made some progress or breakthrough, they were always there to set me up and plan the next stage! They led me through the door of academia, showing me by example the rigor and professionalism of being an academic. I learned more about the workings and rules of the academic world, as well as expanding my horizons and thinking. It is no exaggeration to say that without Emma García-Meca and Jennifer Martínez-Ferrero, I would not have been able to complete my PhD and make so much progress! Secondly, I would like to thank my family. They have been most encouraging and supportive throughout the process of completing my PhD. I could not have completed this journey without their company and support.So far, I have finished writing my academic thesis and my PhD will come to an end, but I will continue to work hard! Thanks again to you all for your support and help! Cartagena, 2023