Fryer, Luke K., and Kaori Nakao. “The How of Survey Self-Report: VAS-Likert-Slide-Swipe. Same Difference?”. Frontline Learning Research 8, no. 3 (March 30, 2020): 10–25. Accessed February 28, 2025. https://flr.journals.publicknowledgeproject.org/flr/index.php/journal/article/view/501.