Abstract
Abstract Reactive psychosis (RP) is a trauma-induced category whose meaning has varied in relation to the role attributed to lived experiences or vulnerable personality. It has long been described in different countries, but seldom investigated under the influence of symptom-based psychiatric classifications. This article aims to examine the development of RP since the early 20th century, outline how it has been incorporated in modern diagnostic classifications, and set out empirical findings. It is likely that variations in terminology and diagnostic practice have affected estimates of the frequency and hampered the validity of RP in earlier studies. To enhance reliability, RP underwent several changes in successive Diagnostic and Statistical Manual of Mental Disorders and ICD versions and was eventually replaced with descriptive categories for short-lived psychotic disorders. Clinical observations during the COVID-19 pandemic attest the durability of RP, but the current categories prove unhelpful in identifying it and have failed to encourage research.
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