Professor Sik-Yum Lee was a leading statistician who had a tremendous impact on a wide variety of topics in Psychometrics and Statistics. The aim of the conference is to pay tribute to Professor Lee whose work had profound and wide-ranging influences on Psychometrics and Statistics and whose ideas never cease to inspire academic researchers. The conference will also bring together some of the most prominent researchers to celebrate Professor Lee’s contribution to Psychometrics and Statistics on the major themes of his work.