A normal distribution or curve of IDI Developmental Orientation (DO) scores is based upon a DO of 100, representing the 50th percentile of respondents taking the IDI.
The average distribution of the mindsets is roughly:
Denial - 3%
Polarization - 15%
Acceptance - 15%
Adaptation - 2%
These results are from 2 internal analyses conducted by IDI, LLC with a total of 9417 respondents.
For more information, see Hammer, M.R. (2011). Additional cross-cultural validity testing of the Intercultural Development International Journal of Intercultural Relations, 35, 474-487, https://idiinventory.com/wp-content/uploads/2014/02/IDI-Validation-article-2011.pdf