Although there is a relationship between paranoia and loneliness in several studies, the mechanisms that explain how loneliness augments paranoia remain unclear. The study investigates the effects of self-concept in the relationship between loneliness and paranoia.

149 participants (male N=70, female N=79, mean age: 22.05 years) completed the questionnaires measuring levels of loneliness, self-concept, and paranoia.

Data from this study show that loneliness has a significantly negative effect on self-concept and positive effect on paranoia. Self-concept has a significantly negative effect on paranoia. Also, it was analyzed that meditating effect on self-concept is significant on the relationship between loneliness and paranoia

Based on the result of this study, it was confirmed that loneliness could activate self-concept negatively, which leads to an increase in paranoia. Also, current results suggested that in the treatment of paranoia, it was important to deal with feeling of loneliness as well as intervention in self-concept.