Modeling Frustration Trajectories and Problem-Solving Behaviors in Adaptive Learning Environments for Introductory Computer Science. - Tian, Xiaoyi; Wiggins, Joseph B.; Fahid, Fahmid Morshed; Emerson, Andrew; Bounajim, Dolly; Smith, Andy; Boyer, Kristy Elizabeth; Wiebe, Eric N.; Mott, Bradford W.; Lester, James C. (2021)