Clustering of Emotional States under Different Task Difficulty Levels for the Robot-assisted Rehabilitation system-RehabRoby. - Yigit Can Aypar; Yunus Palaska; Ramazan Gokay; Engin Masazade; Duygun Erol Barkana; Nilanjan Sarkar (ICINCO (1), 2014)

Distinguishing levels of challenge from physiological signals for the robot-assisted rehabilitation system, RehabRoby. - Yunus Palaska; Huseyin Erdogan; Hazim Kemal Ekenel; Engin Masazade; Duygun Erol Barkana (CCECE, 2017)

Vision-based game design and assessment for physical exercise in a robot-assisted rehabilitation system. - Huseyin Erdogan; Yunus Palaska; Engin Masazade; Duygun Erol Barkana; Hazim Kemal Ekenel (IET Comput. Vis., 2018)

Exploring dynamic difficulty adjustment mechanism for rehabilitation tasks using physiological measures and subjective ratings. - Fatih Özkul; Yunus Palaska; Engin Masazade; Duygun Erol Barkana (IET Signal Process., 2019)