Abstract
In recent years, the concept of "positive illusion" is emphasized. However, there are a few studies about this. Purpose of this study is promoting better understanding of "positive illusion" and researching the relation between "positive illusion" and risk perception or risk-taking behavior. We conducted research with questionnaire that contained measurements of risk perception and risk-taking behavior and self-cognition. As a result, In the optimism of self, we turned up that positive cognition control dangerous behavior. We can look at proper judgment by positive thinking for future of oneself that avert dangerous event. However this result is one of effect of "positive illusion". After this, we thought important to promote better understanding of "positive illusion".
