Objectives: To investigate the longitudinal relationship between subclinical psychotic symptoms and social functioning in a representative general population sample of adolescents.
Method: Data were derived from a routine general health screening of 1909 adolescents in a circumscribed region. Baseline measurement was in the second grade of secondary school (T0), and follow-up occurred approximately 2 years later (T1). Social functioning and subclinical psychotic symptoms of hallucinations and delusions were assessed at both time points.
Results: Baseline (T0) social problems preceded follow-up (T1) subclinical delusions, but not T1 subclinical hallucinations. Similarly, T0 delusions preceded social problems at T1, but T0 hallucinations did not.
Conclusion: This longitudinal general population study demonstrated a bidirectional association between social problems and delusions, but found no link between social problems and hallucinations. This may reflect a downward negative spiral where delusional thoughts and social problems reinforce each other.
Keywords: delusions; hallucinations; social cognition; social functioning; subclinical psychosis.
© 2019 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.