This instrument is designed to measure openness, self-awareness, lack of ego, supportive-ness and capacity for self-critique. Questions can be found on page 61 of the attached article. Note that this instrumentwas designed for use in clinical psychology contexts; for the academic advising initiative, the team changed the word "client" to the word "student."  The Purdue study is only using the questions which measure openness.

Citation: Gonzalez, E., Sperandio, K. R., Mullen, P. R., & Tuazon, V. E. (2021). Development and initial testing of the Multidimensional Cultural Humility Scale. Measurement and Evaluation in Counseling and Development, 54(1), 56-70.