Negative personality traits and cognitive dissonance explain why some people are such sore losers that they can not concede a defeat.
Grandiose narcissists are more likely to be "mentally tough", experience less stress, and are less prone to depression.
Researchers report those with trait anger, those who get angry as a disposition, are more likely to overestimate their intelligence level. Interestingly, researchers say, trait anger is linked to grandiose narcissism.
Narcissists show interest in specific targets for relationships, and are not generally concerned as to whether the potential partner is currently in a relationship or not, researchers report. However, researchers note, narcissists are more likely to engage in 'mate poaching' than those who do not have this personality trait.