Casilli, C. (2012). Badge system design: What we talk about when we talk about validity. Persona. Retrieved from http://carlacasilli.wordpress.com/2012/05/21/badge-system-design-what-we-talk-about-when-we-talk-about-validity/. In her article “Badge System Design: What We Talk About When We Talk About Validity,” Casilli (2012) addressed questions andom() *…
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