A recent study in Poland found that loneliness is bidirectionally associated with paranoid thoughts, and this association appears stronger than the link between social isolation and paranoia. The authors suggest that social isolation contributes to loneliness, which in turn fosters paranoid thoughts. They also note that the connection may work in both directions, with paranoid thinking potentially making people lonelier and increasing social isolation. The paper was published in Psychological Medicine.
Paranoid thoughts involve suspicions or beliefs that others might try to harm, deceive, or take advantage of someone. They often arise without clear evidence and can distort how everyday interactions are interpreted. For example, a person might believe coworkers are secretly plotting against them, even when no signs support this.
These thoughts can range from mild, occasional doubts about a stranger’s intentions to severe, persistent beliefs. Stress, anxiety, and fatigue can heighten the likelihood of experiencing paranoia. In some cases, such thoughts are linked to mental health conditions such as paranoid personality disorder, delusional disorder, or schizophrenia. Paranoid thinking can make neutral situations seem threatening, prompting withdrawal from others, avoidance of social contact, or conflict in relationships. It can also trigger strong emotions such as fear, anger, or defensiveness.
Study author Błażej Misiak aimed to investigate whether cognitive processes help explain the connection between social disconnection and paranoid ideas. He also examined whether social isolation and loneliness differ in how they relate to paranoid thoughts in the general population.
It is important to note that social isolation and loneliness are related but distinct concepts. Social isolation is an objective state, referring to having few or no social contacts or interactions. Loneliness, on the other hand, is the subjective feeling of disconnection or a lack of meaningful relationships. Isolation describes the external situation, while loneliness reflects the internal emotional experience. Someone may feel lonely even without being socially disconnected, and someone with few social contacts may not necessarily feel lonely.
The study recruited participants to represent the Polish population in terms of age, gender, education level, employment status, and place of residence. There were two waves of data collection. In the first, 5,099 individuals participated; 3,275 of them completed the second assessment. The participants’ average age was 45 years, and 48% were men.
Participants completed measures of loneliness (the 11-item De Jong Gierveld Loneliness Scale), social isolation (the Lubben Social Network Scale), cognitive biases (the Davos Assessment of Cognitive Biases), rejection sensitivity (the Adult Rejection Sensitivity Questionnaire), paranoid ideation (the Revised Green et al. Paranoid Thoughts Scale), depressive symptoms (the Patient Health Questionnaire-9), and anxiety (the Generalized Anxiety Disorder-7). These assessments were administered at both time points, allowing the researchers to examine their stability and relationships over time.
Misiak used a statistical method called network analysis to explore how these psychological characteristics were connected. The results suggested that loneliness was the most central element in the network, serving as the best predictor of the other traits.
The findings indicated that loneliness may be bidirectionally linked to paranoid thoughts. Loneliness could foster paranoid thinking, while paranoia may also contribute to feelings of loneliness. Cognitive biases may play a role in this relationship, with both loneliness and paranoia shaping biased thinking, which then strengthens their mutual influence. Social isolation predicted paranoia indirectly, through loneliness. In other words, social isolation may lead to loneliness, which can encourage paranoid thoughts, and those thoughts may then increase loneliness.
“Social disconnection might be bidirectionally associated with paranoid thoughts. However, loneliness is more closely tied to paranoid thoughts compared to social isolation. Cognitive processes might mediate the association of social disconnection with paranoid thoughts,” the study authors concluded.
The study sheds light on the links between loneliness, social isolation, and paranoid thoughts. However, it should be noted that the study was conducted on individuals from the general population, meaning that the average levels of loneliness, paranoid thoughts, and cognitive biases, were likely not very high. Also, the study had a very high attrition rate, with only 64% of participants completing the second survey.
The paper, “Cognitive processes and pathways between social isolation, loneliness, and paranoia: findings from a cross-lagged network analysis of population-based data,” was authored by Błażej Misiak.
