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Recent years have seen considerable progress in epidemiological and molecular genetic research into environmental and genetic factors in schizophrenia, but methodological uncertainties remain with regard to validating environmental exposures, and the population risk conferred by individual molecular genetic variants is small. There are now also a limited number of studies that have investigated molecular genetic candidate gene-environment interactions (G × E), however, so far, thorough replication of findings is rare and G × E research still faces several conceptual and methodological challenges. In this article, we aim to review these recent developments and illustrate how integrated, large-scale investigations may overcome contemporary challenges in G × E research, drawing on the example of a large, international, multi-center study into the identification and translational application of G × E in schizophrenia. While such investigations are now well underway, new challenges emerge for G × E research from late-breaking evidence that genetic variation and environmental exposures are, to a significant degree, shared across a range of psychiatric disorders, with potential overlap in phenotype.

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The cognitive model of OCD proposes that certain beliefs may contribute to the development and maintenance of this disorder. To date, however, it is not yet clear which beliefs are more relevant for explaining OCD symptomatology; moreover, their causal status is yet to be clearly established. In the effort to identify other constructs and processes related to OCD, the phenomenon labeled "not just right experiences" (NJREs) has received increasing attention. In this study, measures of NJREs (the NJRE-Q-R), OCD symptoms, general distress (i.e., anxiety, and depression), and perfectionism were administered to a large sample of college students and a small sample of OCD and non-OCD patients. The clinical sample completed also a measure of OC beliefs. Results showed that NJREs could be reliably measured through a self-report format in non-clinical and clinical Italian individuals. A specific association between NJREs severity and OCD symptoms was found in the non-clinical sample, after controlling for anxiety, depression and perfectionism. The NJRE-Q-R Severity scale clearly discriminated OCD patients from patients with other anxiety disorders or depression. Lastly, the NJREs measure differentiated the clinical groups when OC beliefs were controlled, whereas OC beliefs did not discriminate among the groups after NJREs severity was controlled. The concept of NJREs may contribute to improve current psychological and biological model of OCD.

Aim From September 2012, the Reggio Emilia Department of Mental Health developed a specific program (the “Reggio Emilia At‐Risk Mental States” [ReARMS] protocol) as a diffused, “liquid” infrastructure for early intervention in psychosis. Aims of the current study are (a) to describe the ReARMS macroscopic organization and (b) to examine specific process indicators during the first 5 years of clinical activity. Methods All participants (n = 300) were young help‐seekers, aged 13 to 35 years, who completed the Comprehensive Assessment of At‐Risk Mental States (CAARMS). Results At baseline, 95 (31.7%) participants did not meet CAARMS‐defined criteria, while 205 (68.3%) were offered a dedicated protocol of care: 154 (75.1%) of them were enrolled in the program, 19 (9.3%) refused and 32 (15.6%) dropped out during the first year of treatment. Individuals enrolled in the ReARMS protocol were mainly referred by general practitioners (33.3%), emergency room/general hospital (24%) or they were self‐referred (15%). In comparison with ultra‐high risk individuals, patients with first episode psychosis showed significantly higher mean age at entry and preponderance of males, as well as higher percentages of history of substance abuse and previous hospitalization. Conclusions An early intervention in psychosis service in Italian child/adolescent and adult mental health services are feasible and clinically relevant, also in adolescents, who have a high risk of falling through the child‐adult service gap as they cross the transition boundary between services.