1. The relationship between difficulty and hedonic satisfaction of video games;Jia,2009
2. Evaluating user experience factors using experiments: Expressive artificial faces embedded in contexts;Lankes,2010
3. User-centered design in games;Pagulayan,2002
4. User experience evaluation methods in academic and industrial contexts;Roto,2009
5. A circumplex model of affect;Russel;J Personal Social Psychol,1980