This paper describes the studies I have undertaken so far and states the next steps for my PhD. After a brief introduction, I state the motivation for the study. Then, the application of a well-established theory in psychology domain on a video game is articulated. The theory is "Theory of Action Phases" and it simply claims that people happen to be in deliberative mindset while selecting goals and in implemental mindset while pursuing them. In order to test the theory in the gaming domain, a lab experiment is designed. Unbeknownst to the participants, they were induced to the two mindsets separately and asked to play a video game. I observed that the participants' game performances and predictions of self-scores were affected by their mindsets. Players in the implemental mindset scored significantly better and they better predicted their scores. Lastly, I state the next steps to follow and the contributions of my future PhD studies.