The Berlo S-M-R-C Model accounts for a variety of ěhumanî variables that are present in person-to-person communication. When one is attempting to convey an emotionally complex message, the Berlo Model may be the more appropriate choice. For the transmission of a straightforward message where both parties have a similar knowledge base, the Shannon-Weaver Model, although often thought of as simplistic, can be more effective than the Berlo Model.