Previous research has suggested that paranormal beliefs and experiences are associated with thinner mental boundaries and traumas during childhood. This paper examines more thoroughly the relationship between paranormal experiences, mental health and boundaries, and psi abilities. One hundred and sixty two participants completed questionnaires about paranormal experiences (AEI), mental health (MHI-17), mental boundaries (BQ-Sh), traumas during childhood (CATS) and life-changing events (LES). A controlled psi experiment was also conducted. Significant correlations were found between paranormal experiences and mental boundaries, traumas and negative life events. The overall results were non-significant for the psi task and no significant correlation was found between psychological variables and psi results. These findings suggest that mainly mental boundaries concerning unusual experiences and childlikeness are associated with paranormal experiences. They also highlight the importance of association between emotional abuse and paranormal experiences, and that paranormal experiences occur especially frequently after negative life events. (C) 2009 Elsevier Ltd. All rights reserved.