The Intercultural Development Inventory (IDI) was initially developed in 1998. It was revised in 2003, and again in 2010. The infographic below describes the development and validity testing of the IDI. The current version of the IDI that is used is Version 5, which has been in place since 2019. However, the changes made between 2010 and 2019 were to the IDI Profile Reports and related systems, rather than to the IDI assessment itself.
The original published research describing the development of the IDI and subsequent validation studies are available in the following articles:
- Hammer, M.R. (2003). Measuring intercultural sensitivity: The intercultural development inventory. International Journal of Intercultural Relations, 27, 421-443.
- Hammer, M.R. (2011). Additional cross-cultural validity testing of the IDI. International Journal of Intercultural Relations, 35, 474-487.
- Wiley, A. (2016). Intercultural Development Inventory (IDI): Independent review. Research report from ACS Ventures.
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Summary of Independent Validation of the IDI Conducted by ACS Ventures: 2016-2017