Frank Dignum and I have started this new journal, which we will edit. The reason for this is that we feel that the cognitive and the social need to be studied together. That is both cognitive processes and social processes explicitly represented in the same simulations/systems. Much of human cognition is fundamentally social and makes no sense away from its social context. Much social phenomena can only occur (and thus be understood) when there is sufficient cognitive hooks (e.g. context-sensitivity or face recognition). Thus we hope to focus and stimulate research which does not just look at one side (cognitive or social) with only a nod to the other, but integrates the two aspects and understands them together.
More details about the journal can be found at: http://www.springer.com/42419