The purpose of this work is to apply the "Interest-Expectation-Attitude Model" (IEA Model) to explain the development of communication - and therefore of relationship - in an international environment. From the IEA Model illustration it is possible to grasp why several people with exactly the same needs may show numerous interests, expectations and attitudes, which may be explained by differences on perception and on how the opinions are built and maintained. With interdisciplinary view and disclosed evidence, this paper explores cases of culture shock in business and corporate life, highlighting the difference between Anglo-Saxon and Brazilian culture.