Suying Ang

1 Introduction Psychotic disorders are a major cause of disability globally, with significant personal, familial, societal, and economic costs (Charlson et al. 2018). Early detection and timely provision of evidence-based care during the initial stages of psychotic illness have been shown to improve clinical and functional outcomes (Correll et al. 2018). Consequently, specialised early intervention services for first-episode psychosis (FEP) have proliferated worldwide in recent decades.