Judgments of traits are subject to wishful thinking or egocentric bias more if they are ambiguous than if they are unambiguous. Consider that fairness and emotionality are hard to judge, esp. However, ability can be more easily tested or demonstrated. Thus, people's wishful thinking tendency is lower for the trait that is less ambiguous, or more demonstrable. Hence, people make egocentric judgments, because the amount of information available for the judgment is greater for oneself than others, not because one is motivated to think better about oneself than others.
People also tend to use wishful thinking for events.
People will even apply wishful thinking to events they cannot control. For example, people will think their team can come back from a halftime deficit, even though the likelihood of doing so is low. Wishful thinking works in the opposite direction for negative events. Compared to the average person, people believe they are less likely to be at risk for negative events, such as developing cancer, or getting divorced, or having an automobile accident. There is also the idea of false uniqueness, which describes the misjudgment of one's similarity to others.