Loneliness in narcissistic vulnerability: Examining domains of personality functioning.

Research has indicated loneliness to be a detrimental correlate of narcissistic vulnerability. However, no research has examined if this relationship persists across time or why it occurs. The present study explores the link between narcissistic vulnerability and loneliness across time and examines which domains of personality dysfunction (i.e., identity, self-direction, empathy, and intimacy) may account for why narcissistic vulnerability is related to loneliness. Adult participants (N = 298) were recruited from Prolific and completed study questionnaires assessing narcissistic vulnerability, narcissistic grandiosity, loneliness, domains of self and interpersonal functioning, and neuroticism. Two months later, participants repeated the measure of loneliness. Correlations among all study variables were calculated, followed by linear regression analyses to investigate how personality functioning domains may mediate the longitudinal relationship between narcissistic vulnerability and loneliness. The effects of baseline loneliness, relationship status, and trait neuroticism were controlled for. Narcissistic vulnerability, but not narcissistic grandiosity, was associated with loneliness at baseline and 2 months later. Intimacy functioning, but not identity, self-direction, or empathy functioning, was a significant mediator of the relationship between narcissistic vulnerability and loneliness over time. These findings suggest that narcissistic vulnerability may contribute to the development or maintenance of loneliness across time, highlighting the role of impaired intimacy functioning in this relationship. The impact of these findings on our understanding of interpersonal functioning in narcissistic vulnerability, as well as clinical implications, is discussed.