Grandiose narcissism versus vulnerable narcissism and impulsivity

Correlations between the grandiose narcissism and vulnerable narcissism with two self-report personality measures (i.e., BIS-11 and I-7) and two behavioral tasks (i.e., Stop-Signal Task and Delay-Discounting task) of impulsivity in 338 students were examined. As one of the first studies to apply a two-dimensional approach to narcissism (i.e. grandiose narcissism and vulnerable narcissism) in different self-report and behavioral impulsivity measures, the present results have reported that both grandiose and vulnerable narcissism showed a significant positive correlations with the self-reported impulsivity. Moreover, the grandiose narcissism has shown significant associations with both behavioral tasks of impulsivity. Contrary, vulnerable narcissism was negatively related to the stop reaction time people high in vulnerable narcissism scored shorter stop reaction time values and, consequently, presented less impulsive responding.