IDI: Intercultural Development Inventory: Developing Intercultural Competence"IDI LLC, owned and operated by Mitchell R. Hammer, Ph.D. specializes in the assessment and development of intercultural competence based on the Intercultural Development Inventory® (IDI®). The Intercultural Development Inventory® (IDI®) is a statistically reliable, cross-culturally valid measure of intercultural competence adapted from the Developmental Model of Intercultural Sensitivity."