This study aimed to examine whether self-reported hypomanic and psychotic symptoms are correlated in a non-clinical population. A sample of 303 undergraduates from the UK, Ireland, the US, Australia, New Zealand and Canada (14.7% male, 84.2% female, age 18-65) completed an online battery consisting of the 32-item Hypomania Checklist (HCL-32) and psychosis questions from the Diagnostic Interview Schedule (DIS-P). The HLC-32 total score correlated significantly with the DIS-P total score; rho = 0.16, p<0.01, DIS-P Delusional beliefs subscale; rho = 0.15, p<0.01 and DIS-P Hallucinatory experiences subscale; rho = 0.11, p<0.05. The HCL-32 Risk-Taking or Irritable subscale correlated with the DIS-P total score; rho = 0.26, p<0.001, Delusional beliefs subscale; rho = 0.26, p<0.001 and Hallucinatory experiences subscale; rho = 0.20, p<0.001. In conclusion, hypomanic symptoms appear to be related to psychotic symptoms in non-clinical populations, going against previous research suggesting that this is not the case.
T. Richardson and H. Garavan, 2009. Self Reported Hypomanic and Psychotic Symptoms are Positively Correlated in an International Sample of Undergraduate Students. Asian Journal of Epidemiology, 2: 59-65.