Tradition of research of ambiguity tolerance came into Russia few decades ago. Main basic findings of this area of psychology have come from international psychological science, therefore it is actually to review and analyze foreign studies. This paper has to do with contemporary period of ambiguity tolerance investigations, it does not pretend on de-scribing of all types of researches, whereas it highlights some of them using detailed examples from modern papers. We review papers in following fields: researches based on correlations, effort to construct a theoretical model, cross-cultural approaches, practical research, examining the role of ambiguity tolerance in education.