In problem-solving situations, the contextual features of problems affect student reasoning. Using Newton’s Third Law as an example, we study the detail of the involvement of contexts in students’ uses of alternative conceptual models. Through research, we identified four contextual features that are frequently used by students in their reasoning. Using these results, a multiplechoice survey wa...

This paper describes a representation of the dynamics of human walking action for the purpose of person identification and classification by gait appearance. Our gait representation is based on simple features such as moments extracted from video silhouettes of human walking motion. We claim that our gait dynamics representation is rich enough for the task of recognition and classification. The...

We study a dynamic coordination process in which agents are uncertain about the actions of their fellow agents, and anticipate strategically relevant information. Because of the uncertainty and learning, (ir)reversibility of actions has important strategic consequences. We find that the reversibility option can either enhance or hamper efficient coordination, and we characterize the direction o...