This paper is twofold. First, we present a new method for collective intention recognition based on mainstream philosophical accounts. Second, we extend our previous Elder Care system with collective intention recognition ability for assisting a couple of elderly people. The previous system was just capable of individual intention recognition, and so it has now been enabled to deal with situations where the elders intend to do things together. 1.

This document outlines doctoral research being undertaken by Reid Kerr, under the supervision of Robin Cohen. In this research, we are investigating the problem of detecting and identifying groups of agents that are collaborating, within a larger population. In the scenarios with which we are primarily concerned, agents may cooperate to further their own interests, despite the fact that this may be unwelcome or forbidden. Colluding agents, then, are unlikely to advertise their membership in a team, and may actively seek to conceal their cooperation. We address the problem of identifying such coalitions and their activities.