Hello and thank you for reaching out with your questions regarding cultural humility.
I cannot think of a particular validated scale for cultural humility, but I know there are several examples of process and outcomes measures related to cultural humility in the context of community research partnerships that may be helpful. In particular, Nina Wallerstein's team has developed a conceptual model of CBPR that presents measurable outcomes that one can consider in their measurement approaches -- https://equityhealthj.biomedcentral.com/articles/10.1186/s12939-022-01663-y. Another article that comes to mind is from Foronda et al (2021), where they offer some factor items that are indicative of key tenets in cultural humility. I recommend reviewing the items as they appear to be adaptable across contexts, not just clinical settings. For instance, the attention to power imbalances and diversity as a factor in our perspectives may be relevant to apply with your partners.
As an alternate, it may be beneficial to think about the core components of cultural humility and co-create an instrument with your partners instead. If the purpose of the instrument is for holding accountability and capturing progress, then co-creating a tailored instrument may be more beneficial. If you are seeking to test whether cultural humility is impacting certain outcomes, then I think you may need to develop instrumentation for the project.
Our community toolbox also has some materials that expand on the core tenets of cultural humility that may be a good starting point for your discussion with partners: Multicultural collaboration,
Hope that this information gives you a direction on where to go next!
