Time Based Models of Trust
Time Based Models of Trust
Trust has been studied in many different contexts, but is coming into focus again in social networks. A great deal of information is exchanged today on social networks. Sometimes this exchange is between people who know each other and sometimes it is not. In any case, people are forced to make quick decisions about trust in many social contexts based on limited information. We examine the impact time plays in trust models.
In our first piece of work, we consider a model that incorporates factors impacting trust from many different time scales. At the lowest level, we consider the impact cognitive heuristics and biases have on trust decisions. These are the quickest factors that are included in the trust decision. The second level considers the more deliberate, system 2 type, trust decisions based on prior experiences with the trustee and other social factors. This is further followed by additional data that can be gathered from the network to support or refute the trust decision, if the trustor chooses to engage in them. This work is presented at the Trust in Agent Societies Workshop held in conjunction with AAMAS 2011.
In our second piece of work, we consider the case where the trustor has to incorporate two factors into the decision. The first one is called competence, it measures how capable is the trustee to accomplish a task. The second one is called willingness, it measures how much energy or bandwidth the trustee is willing to allocate to the trustee. Both factors play a significant role in deciding whether to trust someone for a time-critical mission. For example, if the objective is to spread information to the network quickly, the right combination of both factors is needed. We develop models based on two factors and show how they can be incorporated into decision making. This work is being presented at the 2012 IEEE Conference on Cognitive Methods in Situation Awareness and Decision Support, COGSIMA 2012.
Saturday, October 1, 2011