I'm a certified teacher, currently working on my PhD in Health Education and Promotion in a certain psychology-based department. My focus of study is game psychology, with particular emphasis on physical activity promotion, though to be honest it's all about the context in which you read the literature, and I'm usually applying that to video games before physically-active games.
The general idea is to help the preventative health industry do a better job of keeping people active, though good cops make the best criminals, and I could easily be dissuaded to the dark side of making video games more addictive. Bwahahaha.
Ok, now we're going to get slash fiction of Wint x Kachi somehere... rule 34 and all...
Never confuse your inference as the listener for an implication of the speaker.
Good games are subjective like good food is subjective. You're not going to seriously tell me that there's not a psychological basis for why pizza is great and lutefisk is revolting. The thing about subjectivity is that, as subjects go, humans actually have a great deal in common.