  Our social interactions mainly depend on the social phenomenon called trust.
We evaluate our trust in our peer to decide whether to start an interaction or
not. When our information about the peer is not sufficient, we use the
knowledge of others. This knowledge can also be referred to as the reputation
of the peer in the community. Like real-life communities, trust and reputation
play a key role in virtual communities, too. These two notions help us overcome
the complex interactions between agents in virtual communities. In previous
studies regarding this topic, the social aspect of trust and reputation is
partly ignored. In this paper, we will review an article which we accept as a
starting point and compare it with another article that provides a more
advanced model. Additionally, a new trust model which is mainly based on
sociological notions will also be introduced.
