Stemler, S., Imada, T, and Sorkin, C. (2014). Development and validation of the Wesleyan Intercultural Competence Scale (WICS): A tool for measuring the impact of study abroad experiences. Frontiers: the Interdisciplinary Journal of Education Abroad, 24, 25-58. https://files.eric.ed.gov/fulltext/EJ1062089.pdf

Full instrument with all questions and a scoring guide is available at the end of this open-source article.