PARENTAL BELIEF SYSTEMS, CONFLICT RESOLUTION STRATEGIES, AND CULTURAL ORIENTATION IN THE MOTHER-CHILD INTERACTIVE CONTEXT: a comparative study of two Costa Rican samples Dissertation Presented to the Faculty of Human Sciences, Department of Cultural and Developmental Psychology, University of Osnabrück in Partial Fulfillment of the Requirements for the Degree of Doctor in Sciences (Rer.Nat.) by Mariano Rosabal-Coto San José, Costa Rica Supervisor: Prof. Dr. HEIDI KELLER Co-supervisor: Prof. Dr. SIEGFRIED GREIF NOVEMBER, 2004