I am from Department of Psychology of Higher School of Economics. I study problem solving, systems thought, and help and counteraction in social interactions. Both rationality and irrationality are important here.
Web: http://www.hse.ru/en/staff/apoddiakov#sci, http://papers.ssrn.com/sol3/cf_dev/AbsByAuth.cfm?per_id=426114
Concerning the transitivity axiom, what about rational choices in situations of intransitivity cycles?