Shenakht Journal of Psychology & Psychiatry

Introduction: Failure to satisfy psychological needs is considered one of the causes of borderline personality disorder symptoms, and the mechanisms of this relationship are not very clear.
Aim: The present study was conducted with the aim of causal modeling of borderline personality disorder symptoms based on failure to satisfy psychological needs with the mediating role of inhibitory control.
Method: The method of the present research was a description of the correlation type. The statistical population of the research was all undergraduate students of Mohaghegh Ardabili University in the academic year of 2020-2021, and a sample of 153 people was selected from this population using a multi-stage cluster random sampling method. In order to collect data, the borderline personality scale (Jackson & Claridge, 1991), the basic psychological needs questionnaire (Guardia et al, 2000) and the Go/No Go  test (Hoffman, 1984) were used. Data analysis was done using structural equation modeling with SPSS 28 and Smartpls3 software.
Results: The results of structural equation modeling showed that satisfaction of psychosocial needs (P<0.001; β=-0.14) and inhibitory control (P<0.001; β=-0.38) had a direct and negative effect on personality disorder symptoms. It has a border. Satisfying psychological needs (P<0.001; β=0.27) has an indirect effect on the symptoms of borderline personality disorder with a positive effect on inhibitory control.
Conclusion: These results show that the failure to satisfy psychological needs, in addition to being an independent risk factor for borderline personality disorder, can lead to the occurrence of these symptoms by reducing inhibitory control.