Vaingankar JA, et al. – This study’s objective was to establish the validity and reliability of the Short Warwick Edinburgh Mental Well–being Scale (SWEMWBS) in service users with schizophrenia, depression and anxiety spectrum disorders in Singapore and estimate SWEMWBS scores across socio–demographic and the three psychiatric diagnostic groups in the sample. The results of this study showed adequate validity and authenticity of the SWEMWBS in people with schizophrenia, depression and anxiety spectrum disorders in Singapore.