  In this work we propose a new extension for the Maki-Thompson rumor model
which incorporates inter-group directed contacts. The model is defined on an
homogeneously mixing population where the existence of two differentiated
groups of individuals is assumed. While individuals of one group have an active
role in the spreading process, individuals of the other group only contribute
in stifling the rumor provided they would contacted. For this model we measure
the impact of dissemination by studying the remaining proportion of ignorants
of both groups at the end of the process. In addition we discuss some examples
and possible applications.
