First of all, I would like to thank Professor Ricardo Campos for all the hours of guidance and patience and for motivating to push through any adversity that arose throughout this project. To Professor Alípio Jorge for providing his expertise on more sensible matters and for his aid in moments of need. I would also like to thank Jorge Duque, who was responsible for developing the Time-Matters online demo, for his availability and help, which were fundamental during the initial stages of this work. Thank you to everyone who took the time to participate in either or both of our surveys.To my family, my biggest thanks to my parents in particular, for the unconditional love and support and for always providing me with everything I could ever need. I could not have gotten this far without them.To all my friends, for showing interest in my work and helping me accomplish this task, but above all for being what a friend should be throughout the years.A special thank you to my girlfriend Yasmin, for always supporting me, especially in the toughest moments and for listening to my endless ramblings about this project.